* Thur., Feb. 3, 3:37 p.m. EST / 20:37 UTC - Actual Astronomical Cross-Quarter Day (First actual Astronomical Cross-Quarter Day of year; mid-way point in Winter season: ~Feb. 4).
Traditional Cross-Quarter Day.

* Sun., March 20, 11:33 a.m. EDT / 15:33 UTC - Vernal Equinox - Season of Spring begins in Earth's Northern Hemisphere: beginning of New Year (solar calendar) in Afghanistan and Iran. (~March 20)

* Sun., May 1 - Traditional Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; approximate mid-way point in Spring season (May 1).

* Thur., May 5, 8:25 a.m. EDT / 12:25 UTC - Actual Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; mid-way point in Spring season (~May 5-6).
Traditional Cross-Quarter Day.

* Tue., June 21, 5:14 a.m. EDT / 9:14 UTC - Summer Solstice - Season of Summer begins in Earth's Northern Hemisphere (~June 21).
Also see 1985-1991: Summer "Solstice Day," Annual Free Day at Buhl Planetarium.

* Mon., Aug. 1 - Astronomical Mid-Point of Summer - Traditional Astronomical Cross-Quarter Day, also known as “Lammas” (in the United Kingdom) and “Lughnassad” (in Ireland). Considered approximate date of First Harvest (third traditional cross-quarter day of the year), approximately between the Midsummer Solstice and the Autumnal Equinox (July 31 Eve - Aug. 1).

* Sun., Aug. 7, 8:36 a.m. EDT / 12:36 UTC - Astronomical Mid-Point of Summer - Actual Astronomical Cross-Quarter Day (halfway between the June Solstice and September Equinox: ~Aug. 6 to 7).
Traditional Cross-Quarter Day.

* Thur., Sept. 22 - Falls Prevention Awareness Day (First day of Fall: ~Sept. 22-23).

* Thur., Sept. 22, 9:04 p.m. EDT / Sept. 23, 1:04 UTC - Autumnal Equinox - Season of Autumn begins in Earth's Northern Hemisphere. (~Sept. 22)
Also see: Harvest Moon.

* Oct. 31 / Nov. 1 / Nov. 2 - Traditional Astronomical Cross-Quarter Day Samhain or "All-Hallowsmas", better known as Halloween (Oct. 31 - "All Hallows Eve"), All-Saints Day (Nov. 1), All-Souls Day (Nov. 2) (fourth and last traditional cross-quarter day of year).

* Mon., Nov. 7, 5:36 a.m. EST / 10:36 UTC - Actual Astronomical Cross-Quarter Day (fourth and last actual cross-quarter day of the year: ~Nov. 6-7).
Traditional Cross-Quarter Day.

* Wed., Dec. 21 - Homeless Persons' Memorial Day. (First day of Winter; longest night of the year: ~Dec. 21)

* Wed., Dec. 21, 4:48 p.m. EST / 21:48 UTC - Winter Solstice - Season of Winter begins in Earth's Northern Hemisphere. (~Dec. 21-22)
Also see: "The Stars of Winter" and "The Star of Bethlehem" Planetarium Sky Dramas (web sites include entire planetarium show scripts), performed each Winter in the Theater of the Stars of Pittsburgh's original Buhl Planetarium and Institute of Popular Science.

Byzantine Year 7531 Begins Sept. 14.
Jewish Year (A.M.) 5783 Begins at local Sunset, Sept. 26.
Chinese / Asian Lunar New Year (Lunar Calendar) - Year of the Tiger 4720 Begins Feb. 1.
Roman A.U.C. (Dates from the founding of the City of Rome) Year 2775 Begins Jan. 14.
Nabonassar Year 2771 Begins April 23.
Japanese (Reiwa) Year 4 - Begins May 1.
Grecian Year (Selucidae) 2334 Begins Sept. 14 (or Oct. 14).
Indian Year (Saka) 1944 Begins March 22.
Diocletian Era (Era of the Martyrs) Year 1739 Begins Sept. 11.
Islamic (Hegira) (FCNA date) Year 1444 Begins at first viewing of lunar crescent (New Moon) on evening (after local Sunset) of July 29.
Baha'i Year 179 Begins at local Sunset on 2022 March 21.

SPECIAL NOTES:
(1) All astronomical or sky observations are always weather-permitting.
(2) For calendar entries which describe a relationship between two or more celestial objects, unless otherwise noted all relationships between celestial objects are visual relationships as seen from Earth only.

* Fri., 2021 Dec. 31 - Make Up Your Mind Day. (Dec. 31)

* Fri., 2021 Dec. 31 - Eve of New Year's Day (Traditional). (Dec. 31)

* Fri., Dec. 31 (2017), 11:59:59 p.m. EST / 2018 Jan. 1, 4:59:59 UTC - Anniversary: Suspension of broadcasting, and conclusion of all-news radio programming after 42 years (having started all-news programming on 1975 Oct. 15), by KQV-AM 1410, Pittsburgh (one of the nation's oldest radio stations, having started on 1919 November 19): Link 1 *** Link 2 (Dec. 31)

* Fri., 2021 Dec. 31, 7:00:00 p.m. EST / 2022 Jan. 1, 0:00:00 UTC - Marks the beginning of the New Year by the Coordinated Universal Time scale, the time scale used by many scientists. (Dec. 31)

* Sat., Jan. 1 - Feast of the Circumcision of Christ - Eighth day of the 12 days of Christmas: Dec. 25 to Jan. 5. During the Gregorian Calendar reform, Pope Gregory XIII, chose the Feast of the Circumcision of Christ as the beginning of the New Year in the Roman Catholic Church's Liturgical Year; previously, the Feast of the Annunciation on March 25 (also the Vernal Equinox in the "original" Julian Calendar adopted by the second King of Rome, Numa Pompilius, in the 7th century B.C.) had been considered the beginning of the New Year. (Jan. 1)

* Sat., Jan. 1 - Last day of Kwanzaa - Week-long holiday observance honoring African-American heritage. (Dec. 26 to Jan. 1)

* Sat., Jan. 1 (1863) - Anniversary: Emancipation Proclamation issued by U.S. President Abraham Lincoln during the American Civil War, which decreed that slaves in the rebellious states are free forever. (Jan. 1)

* Sat., Jan. 1 - First Day Hikes in America’s State Parks. (Jan. 1)

* Sat., Jan. 1 - Public Domain Day (Annual) - Copyrighted works from 95 years ago are now copyright-free.
Also see: NPR News Story. (Jan. 1)

* Sat., Jan. 1 (1927) - Anniversary: Establishment of the nation's second radio network, the NBC Blue Network, which focused on news and public affairs programming. Due to a Federal Communications Commission (FCC) rule-making in 1942, NBC was forced to divest the NBC Blue Network, which became the ABC Radio Network. ABC Radio continued the news emphasis; ABC Radio was the first network to report the shooting of U.S. President John F. Kennedy on 1963 November 22 (6 minutes and 50 seconds after the shooting). (Jan. 1)

* Sat., Jan. 1, 12:00:00 Midnight (0:00:00) Prevailing Local Time - For Eastern Standard Time (EST) Zone in North America: 12:00:00 Midnight EST / 5:00:00 Coordinated Universal Time (UTC) which correlates with 12:00:00 Midnight EST - New Year's Day: New Calendar Year begins. (Jan. 1)

* Sat., Jan. 1, 6:00 p.m. EST / 23:00 UTC - Moon at Perigee: 222,471.39207 statute miles / 358,033 kilometers.

* Sun., Jan. 2, 1:33 p.m. EST / 18:33 UTC- Primary Moon Phase: New Moon - Lunation #1225.

* Sun., Jan. 2 - Happy Mew Year for Cats Day. (Jan. 2)

* Mon., Jan. 3 - U.S. Congress begins second session of 116th Congress, U.S. Capitol Building, Washington DC. (Jan. 3)

* Mon., Jan. 3, 4:00 p.m. EST / 21:00 UTC - (Best viewing: Midnight to Dawn, weather-permitting) - Peak of Quadrantid Meteor Shower. (Jan. 3 to 4)

* Mon., Jan. 3, 8:00 p.m. EST / Jan. 4, 1:00 UTC - Mercury 3 degrees north of the Moon.

* Tue., Jan. 4 - Latest time of Sunrise, for the year, for locales (such as Pittsburgh: 7:43 a.m. EST / 12:43 UTC) at or near Earth's +40 North Latitude. (Jan. 4)

* Tue., Jan. 4, 2:00 a.m. EST / 7:00 UTC - Earth at Perihelion (closest Earth approach to the Sun in New Year): 91,406,841.545 statute miles / 147,105,052 kilometers. Over a half-year's time between Earth Perihelion and Earth Aphelion, the difference in distance between the Sun and Earth varies by about 3 million miles. Actually, Earth receives about 7 per-cent more solar energy from the Sun during the time of Earth Perihelion in January, than at the time of Earth Aphelion in July. (Jan. 2 to 5)

* Tue., Jan. 4, 12:00 Noon EST / 17:00 UTC - Saturn 4 degrees north of the Moon.

* Wed., Jan. 5 - National Bird Day. (Jan. 5)

* Wed., Jan. 5 - National Returns Day. The usual date when UPS returns most packages to busniesses, after Christmas. (Jan. 2 to 5)

* Wed., Jan. 5, Evening - "12th Night" of Christmas; end of the 12 days of Christmas, which began on Christmas Day. (Jan. 5)

* Wed, Jan. 5, 7:00 p.m. EST / Jan. 6, 0:00 UTC - Jupiter 4 degrees north of the Moon.

* Thur., Jan. 6 - Feast of the Epiphany; the day after the "12th Night" of Christmas. Tradition celebrates Epiphany as day the Magi arrived in Bethlehem to present gifts to the Christ child. (Jan. 6)

* Thur., Jan. 6 - Orthodox Christmas Eve - As determined by Julian Calendar. (Jan. 6)

* Thur., Jan. 6 - National Returns Day - When the most UPS returns packages are sent back to retailers. (Jan. 5 to 6)

* Fri., Jan. 7 - Orthodox Christmas - As determined by Julian Calendar. (Jan. 7)

* Sat., Jan. 8 (1918) - Mount Wilson Observatory Astronomer Harlow Shapley discovered true magnitude of Milky Way Galaxy and true location of Earth and our Solar System in the Milky Way Galaxy.
On 1941 November 19, Harvard College Observatory Director Harlow Shapley delivered the keynote address at the dedication for a rather unique 10-inch Siderostat-Type Refractor Telescope at Pittsburgh's original Buhl Planetarium and Institute of Popular Science. (Jan. 8)

* Sat., Jan. 8 (1851), 2:00 a.m. Paris Time - Earth's Rotation Day - Anniversary: French physicist Jean Leon Foucault develops a simple device to finally demonstrate and prove that the Earth rotates on its axis: Foucault Pendulum. He demonstrated the Foucault Pendulum, before scientists at the Paris Observatory, on 1851 February 3.
Near the end of his life, Jean Leon Foucault also developed the Siderostat-type Refractor Telescope. (Jan. 8)

* Sat., Jan. 8 - Library Card Registration Day. (2nd Saturday in January)

* Sat., Jan. 8, 8:00 p.m. EST / Jan. 9, 1:00 UTC - Venus at Inferior Conjunction with the Sun (Venus not visible, even with a telescope).

* Sun., Jan. 9 (1793) - First balloon flight in America. (Jan. 9)

* Sun., Jan. 9, 1:11 p.m. EST / 18:11 UTC- Primary Moon Phase: First Quarter.

* Mon., Jan. 10 (1920) - Founding of the League of Nations. (Jan. 10)

* Mon., Jan. 10 - National Clean Off Your Desk Day. (2nd Monday of January)

* Tue., Jan. 11 - Learn Your Name in Morse Code Day. (Jan. 11)

* Tue., Jan. 11 - National Milk Day. (Jan. 11)

* Tue., Jan. 11 - National Human Trafficking Awareness Day. (Jan. 11)

* Tue., Jan. 11, 6:11 a.m. EST / 11:11 UTC- Uranus 1.5 degrees north of the Moon.

* Tue., Jan. 11, 5:00 p.m. EST / 22:00 UTC- Asteroid 3 Juno at Conjunction with the Sun (Juno not visible, even with a telescope).

* Wed.,Jan. 12 (1958) - Establishment of the Special Committee on Space Technology of the National Advisory Committee for Aeronautics (NACA: established 1915 March 3), the predecessor of the National Aeronautics and Space Administration (NASA). (Jan. 12)

* Wed.,Jan. 12, 7:00 p.m. EST / Jan. 13, 0:00 UTC- Asteroid & Dwarf Planet Ceres 1.2 degrees south of the Moon: occultation: Alaska, western portion of Canada, northeastern edge of Russia.

* Thur., Jan. 13 - New Year's Eve, according to the Julian Calendar. (Jan. 13)

* Thur., Jan. 13 - National AMBER Alert Awareness Day. (Jan. 13)

* Thur., Jan. 13, 1:50 a.m. EST / 6:50 UTC- Double-shadow (shadows of 2 of 4 Galilean Moons) Transit on Jupiter; visible, with difficulty, through telescope after Sunset or before Sunrise, weather-permitting.

* Fri., Jan. 14 - Beginning of the New Year, according to the Julian Calendar. (Jan. 14)

* Fri., Jan. 14 - International Kite Day. (Jan. 14)

* Fri., Jan. 14, 4:00 a.m. EST / 9:00 UTC- Moon at Apogee: 252,155.53667 statute miles / 405,805 kilometers.

* Sat., Jan. 15 - Mercury at Perihelion.

* Sat., Jan. 15 (1929) - Anniversary: Birthday of Martin Luther King, Jr. (Observed - USA: Third Monday in January): Birth of Rev. Dr. Martin Luther King, Jr.. (Jan. 15)

* Sat., Jan. 15 (2001) - Anniversary: Launch of Wikipedia, free-of-charge, on-line encyclopedia. (Jan. 15)

* Sat., Jan. 15, 4:00 p.m. EST / 21:00 UTC- Moon 1.8 degrees north of Open Star Cluster M35.

* Sun., Jan. 16 (1786) - National Religious Freedom Day - Commemorates Virginia General Assembly's adoption of Thomas Jefferson's landmark Virginia Statute for Religious Freedom. (Jan. 16)

* Mon., Jan. 17 - Kid Inventors’ Day (K.I.D.), on January 17 in honor of the birth of famous inventor Benjamin Franklin, who invented the first swim flippers at the age of 12. (Jan. 17)

* Mon., Jan. 17 - Martin Luther King, Jr. Day (Observed - USA: Third Monday in January): Birth of Rev. Dr. Martin Luther King, Jr.: 1929 Jan. 15. (Third Monday in January)

* Mon., Jan. 17, 6:48 p.m. EST / 23:48 UTC - Primary Moon Phase: Full Moon - Wolf Moon.
Smallest Full Moon of year, due to Lunar Apogee 3 days earlier.

* Thur., Jan. 20 - National Disc-Jockey (D-J) Day.

* Fri., Jan. 21 - Squirrel Appreciation Day. (Jan. 21)

* Sun., Jan. 23 - Sun rises for first time in year (after Sun setting for last time of previous year on November 18: total of 67 days of darkness) in the northern-most town in United States of America: Barrow, Alaska (330 miles north of the Arctic Circle). (Jan. 23)

* Sun., Jan. 23 - Venus at perihelion.

* Sun., Jan. 23, 5:00 a.m. EST / 10:00 UTC - Mercury at Inferior Conjunction with the Sun (Mercury not visible, even with a telescope).

* Jan. 24 to 28 - Tax Identity Theft Awareness Week. (Last business week of January / first business week of February).

* Jan. 24 to Feb. 2, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Mon., Jan. 24 - National Compliment Day. (Jan. 24)

* Tue., Jan. 25 (1915) - First transcontinental telephone call. (Jan. 25)

* Tue., Jan. 25, 8:41 a.m. EST / 13:41 UTC - Primary Moon Phase: Last Quarter.

* Wed., Jan. 26 - Australia Day, commemorating the first landing in Australia by Captain Arthur Phillip. (Jan. 26)

* Thur., Jan. 27 (1967) - Anniversary: Apollo 1 Fire - Three astronauts perished in flash-fire during pre-launch test: Gus Grissom, Ed White, Roger Chaffee. (Jan. 27)

* Thur., Jan. 27 (1926) - First public demonstration, in London, of a black-and-white, mechanical television system. (Jan. 27)

* Thur., Jan. 27 - Holocaust Remembrance Day (UN). (Jan. 27)

* Thur., Jan. 27 - National Bubble-Wrap Appreciation Day, first used by IBM to safely ship computers in 1961. (Last Monday of January)

* Fri., Jan. 28 (1986) - Anniversary: STS Space Shuttle Challenger (Teacher-in-Space Mission) explosion shortly after launch; seven astronauts perished: Francis Scobee, Michael Smith, Elison Onizuka, Judith Resnik, Ronald McNair, Gregory Jarvis, Christa McAuliffe (Teacher-in-Space). (Jan. 28)
Viewed at Pittsburgh's original Buhl Planetarium and Institute of Popular Science (a.k.a. Buhl Science Center).

* Fri., Jan. 28 - Data Privacy Day. (Jan. 28)

* Fri., Jan. 28 - Earned Income Tax Credit (EITC) Awareness Day. (Last Friday in January)

* Sat., Jan. 29 - Puzzle Day. (Jan. 29)

* Sat., Jan. 29, 10:00 a.m. EST / 15:00 UTC - Mars 2 degrees north of the Moon.

* Jan. 30 to February 5 - Celebrate Catholic Schools Week. (End of January / Beginning of February)

* Sun., Jan. 30, 2:00 a.m. EST / 7:00 UTC - Moon at Perigee: 225,092.95713 statute miles / 362,252 kilometers.

* Mon., Jan. 31 (1958) - Anniversary: First successful launch, by the USA, of an artificial satellite: Explorer 1. (Jan. 31)

SPECIAL NOTES:
(1) All astronomical or sky observations are always weather-permitting.
(2) For calendar entries which describe a relationship between two or more celestial objects, unless otherwise noted all relationships between celestial objects are visual relationships as seen from Earth only.

* Jan. 24 to Feb. 2, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Jan. 30 to February 5 - Celebrate Catholic Schools Week. (End of January / Beginning of February)

* Jan. 31 to Feb. 4 - Tax Identity Theft Awareness Week. (Last business week of January / first business week of February).

* Tue., Feb. 1 (2003) - Anniversary of STS Space Shuttle Columbia disintegration during re-entry; seven astronauts perished: Rick Husband, William McCool, David Brown, Kalpana Chawla, Michael Anderson, Laurel Clark, Ilan Ramon. (Feb. 1)

* Tue., Feb. 1 - Chinese / Asian Lunar New Year, based on a lunisolar calendar of which dates indicate both the moon phase and the time of the solar year. This day is the first day of the Primary Moon Phase of New Moon (as determined from the China time zone), of the first Chinese lunar month in the Chinese Lunar Calendar system.This marks the beginning of the Chinese / Asian Lunar New Year Year of the Water Tiger.

* Tue., Feb. 1, 12:46 a.m. EST / 5:46 UTC - Primary Moon Phase: New Moon - Lunation #1226.

* Tue., Feb. 1 (1865) - National Freedom Day -Date in 1865 when U.S. President Abraham Lincoln signed a resolution proposing the Thirteenth Amendment to the United States Constitution prohibiting slavery. (Feb. 1)

* Tue., Feb. 1 - National Change Your Password Day!. (Feb. 1)

* Tue., Feb. 1 - African American Coaches Day about the benefits of working with a personal or business coach. (First Tuesday in February)

* Wed., Feb. 2 - Traditional Astronomical Cross-Quarter Day Imbolc, and also Candlemas, better known as Groundhog Day. (First traditional Astronomical Cross-Quarter Day of year; approximate mid-way point in Winter season: Feb. 1 Eve - Feb. 2).
(Groundhog Day at Gobler's Knob, Punxsutawney PA 15767, home of Punxsutawney Phil: - Sunrise: 7:26 a.m. EST / 12:26 UTC) .
Actual Cross-Quarter Day.

* Wed., Feb. 2 - World Read Aloud Day. (1st Wednesday in February)

* Wed., Feb. 2, 4:00 p.m. EST / 21:00 UTC - Jupiter 4 degrees north of the Moon.

* Thur., Feb. 3 (1851) - Anniversary: Jean Leon Foucault first demonstrates, before scientists in the Meridian Room of the Paris Observatory, the Foucault Pendulum, which is a proof that the Earth rotates on its axis. He had invented the device on 1851 January 8.
Near the end of his life, Jean Leon Foucault also developed the Siderostat-type Refractor Telescope. (Feb. 3)

* Thur., Feb. 3 - National Girls and Women in Sports Day. (Feb. 3)

* Thur., Feb. 3, 3:37 p.m. EST / 20:37 UTC - Actual Astronomical Cross-Quarter Day (First actual Astronomical Cross-Quarter Day of year; mid-way point in Winter season: ~Feb. 4).
Traditional Cross-Quarter Day.

* Fri., Feb. 4 - Transit Equity Day to honor Rosa Parks on her birthday, for her act of resistance by refusing to give up her seat on the bus in Montgomery, Alabama in 1955, which was a catalyst for the civil rights movement. (Feb. 4 - birthday of Rosa Parks)

* Fri., Feb. 4 - World Cancer Day (WCD). (Feb. 4)

* Fri., Feb. 4 - Thank A Mailman Day. (Feb. 4)

* Fri., Feb. 4 - Lichun - Beginning of first Solar term (of 24 Solar terms in one year) of traditional East Asia calendars (begins when the Sun reaches the celestial longitude of 315° and ends when it reaches the longitude of 330°); also known as the start of Spring (Occurs each year around Feb. 4)

* Fri., Feb. 4 - National Wear Red Day - Go Red for Women movement to heart disease in women (American Heart Association). (First Friday in Feb.)

* Fri., Feb. 4, 2:00 p.m. EST / 19:00 UTC - Saturn in conjunction with the Sun (Saturn not visible, even with a telescope).

* Sat., Feb. 5 - National Weatherperson's Day - Birth of one of America's first weather observers, John Jeffries (picture): 1744 February 5. (Feb. 5)

* Feb. 6 to 12 - World Orphan Week. (1st full week of February)

* Mon., Feb. 7 (1863) - Periodic Table (of Chemical Elements) Day. (Feb. 7)

* Mon., Feb. 7, 3:00 p.m. EST / 20:00 UTC - Uranus 1.2 degrees north of the Moon; occultation: Queen Maud Land (region of Antarctica claimed by Norway). South Sandwich Islands (Overseas Territory of Great Britain in the South Atlantic Ocean).

* Tue., Feb. 8 (1910) - Anniversary: Founding of the Boy Scouts of America. (Feb. 8)

* Tue., Feb. 8 - National Kite Flying Day. (Feb. 8)

* Tue., Feb. 8 - Safer Internet Day. [Second day (Tuesday) of the second (business) week of February]

* Tue., Feb. 8, 8:50 a.m. EST / 13:50 UTC - Primary Moon Phase: First Quarter.

* Wed., Feb. 9, 6:00 a.m. EST / 11:00 UTC - Asteroid & Dwarf Planet Ceres 0.03 degree south of the Moon; occultation: Republic of Seychelles (archipelagic island country in Indian Ocean), Maldives (archipelagic country in the Indian subcontinent of Asia, situated in the Indian Ocean), southern tip of India, Sri Lanka, majority of Southeast Asia, southeastern section of China, Korea, Japan, northern section of Micronesia.

* Thur., Feb. 10 - National Umbrella Day. (Feb. 10)

* Thur., Feb. 10, 10:00 p.m. EST / Feb. 11, 3:00 UTC - Moon at Apogee: 251,591.33162 statute miles / 404,897 kilometers.

* Fri., Feb. 11 (1732) - Anniversary of birth of first American President, George Washington, according to Julian Calendar (also known as "Old Style Calendar"), at use at that time; according to Gregorian Calendar, which we use today, George Washington's birthday occurred on Feb. 22. (Feb. 11)
Science & U.S. Presidents
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Fri., Feb. 11 - International Day for Women and Girls in Science. (Feb. 11)

* Fri., Feb. 11 - National Inventors' Day, anniversary of the birth of the inventor Thomas Alva Edison. (Feb. 11)

* Fri., Feb. 11, 11:00 p.m. EST / Feb. 12, 4:00 UTC - Moon 1.9 degrees north of Open Star Cluster M35.

* Sat., Feb. 12 (1809) - Anniversary: Birth of 16th American President, Abraham Lincoln. (Feb. 12)
Science & U.S. Presidents
See also: Washington's Birthday Observed / Presidents' Day * Sa Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Sat., Feb. 12 (1809) - Anniversary: Birth of English naturalist, Charles Darwin; Darwin Day. (Feb. 12)

* Sat., Feb. 12, 5:00 p.m. EST / 22:00 UTC - Venus shines at its brightest: Apparent Visual Magnitude -4.9, at nearly 40 degrees elongation from the Sun, just 5 weeks after Inferior Conjunction with the Sun.

* Sat., Feb. 12, 8:00 p.m. EST / Feb. 13, 1:00 UTC - Venus 7 degrees north of Mars.

* Feb. 13 to 19 - Random Acts of Kindness Week. (2nd Full Week of Feb.)

* Sun., Feb. 13 - World Radio Day (WRD). (Feb. 13)

* Sun., Feb. 13 - Galentine’s Day - Fun holiday for women, created in 2010 by the NBC-TV program, Parks and Recreation. (Feb. 13 - always day before St. Valentine's Day)

* Sun., Feb. 13 - Autism Sunday / International Day of Prayer for Autism and Asperger Syndrome. (Second Sunday of February)

* Sun., Feb. 13 - Super Bowl Sunday - Championship game for the American National Football League. This evening the Cincinnati Bengals will play the Los Angeles Rams for the championship. (2nd Sunday)

* Mon., Feb. 14 - St. Valentine's Day. (Feb. 14)

* Mon., Feb. 14 - Library Lovers Day. (Feb. 14)

* Mon., Feb. 14 - International Book Giving Day. (Feb. 14)

* Mon., Feb. 14 - National Have a Heart Day to promote awareness of our food choices so as to get or maintain a healthy heart. (Feb. 14)

* Mon., Feb. 14 - National Organ Donor Day. (Feb. 14)
Also see: Story of the youngest heart-lungs transplant recipient, who received her first transplant operation shortly after visiting Pittsburgh's Buhl Planetarium in November of 1985.

* Mon., Feb. 14 - National Clean Out Your Computer Day. (Second Monday in February)

* Tue., Feb. 15 (1564) - Anniversary: Birth of Italian Astronomer Galileo Galilei. (Feb. 15)

* Tue., Feb. 15 (2013) - Chelyabinsk, Russia Meteor, a super-bolide caused by an approximately 20 m (66 ft) near-Earth asteroid, which caused wide-spread damage in Chelyabinsk, Russia. (Feb. 15)

* Tue., Feb. 15 (1820) - Susan B. Anthony Day - Anniversary: Birth of Susan B. Anthony and commemoration of women's suffrage in the United States. (Feb. 15)

* Tue., Feb. 15 - Singles Awareness Day. (Feb. 15)

* Wed., Feb. 16, 11:56 a.m. EST / 16:56 UTC - Primary Moon Phase: Full Moon - Snow Moon.

* Thur., Feb. 17 (1869) - Anniversary: Periodic Table of Chemical Elements. (Feb. 17)

* Thur., Feb. 17 (2015) - Fireball over Pittsburgh seen in several states. (Feb. 17)

* Thur., Feb. 17 - Random Acts Of Kindness Day. (Feb. 17; Part of Random Acts of Kindness Week)

* Fri. through Mon., Feb. 18 to 21 - CITIZEN SCIENCE: The Great Backyard Bird Count. (Presidents' Day holiday weekend, starting on Friday)

* Fri., Feb. 18 - Zodiacal Light visible, with difficulty after evening twilight (visible for up to an hour after dusk) in the western sky of the Northern Hemisphere, for the next two weeks. (February, March)

* Fri., Feb. 18 (1930) - Anniversary: Date of discovery of Planet Pluto (now designated Dwarf Planet 134340 Pluto) discovered by Clyde Tombaugh working at Lowell Observatory in Flagstaff, Arizona. (Feb. 18)

* Sat., Feb. 19 (1473) - Anniversary: Birth of famous Polish astronomer Nicolaus Copernicus. (Feb. 19)
A portrait of Nicolaus Copernicus, donated to Pittsburgh's original Buhl Planetarium and Institute of Popular Science by the Polish Arts League of Pittsburgh, hung on the Mezzanine of Buhl Planetarium.
Also see photograph of the inscription of the name "Copernicus," just under the outer planetarium dome of Pittsburgh's original Buhl Planetarium and Institute of Popular Science.

* Sat., Feb. 19 (1968) - Anniversary: National premiere on National Educational Television (NET - predecessor of PBS, the Public Broadcasting Service) of landmark children's television program, Mister Rogers' Neighborhood, which included puppet character King Friday the 13th (originated at WQED-TV channel 13 in Pittsburgh). (Feb. 19)

* Feb. 20 to 26 - National Engineers Week. [Third or fourth week in February (Sunday through Saturday), which includes George Washington's actual birthday of February 22]

* Feb. 20 to 26 - Montessori Education Week. (Last week of February / first week of March)

* Feb. 20 to 26 - National Brotherhood / Sisterhood Week. (Week which includes Feb. 22, which coincides with George Washington's birthday)

* Sun., Feb. 20 (1491) - Anniversary: "Comet of 1491" which, until 2002, was considered the closest comet to ever approach the Earth. Today, this comet is not considered the closest comet to ever approach the Earth, due to the unreliability of data. (Feb. 20)
More information.

* Sun., Feb. 20 - World Pangolin Day. (Feb. 20)

* Feb. 21 to 25 - Fair Use / Fair Dealing Week, commissioned by the Association of Research Libraries. (Last full business week of February)

* Feb. 21 to 25 - America Saves Week. (Last week of Feb. - Same week as Military Saves Week)

* Feb. 21 to 25 - Military Saves Week. (Last week of Feb. - Same week as America Saves Week)

* Mon., Feb. 21 - Presidents' Day / Washington's Birthday Observed. (USA Federal Holiday: Third Monday in Feb.)
Science & U.S. Presidents
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.
Also see: The Astronomy President.

* Mon., Feb. 21 - International Mother Language Day. (Feb. 21)

* Mon., Feb. 21 - Family Day. (Canada: 3rd Monday)

* Feb. 22 to March 3, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Tue., Feb. 22 (1732) - Anniversary: Birth of first American President, George Washington, according to Gregorian Calendar, which we use today; according to Julian Calendar (also known as "Old Style Calendar") at use at that time, George Washington's birthday occurred on Feb. 11. (Feb. 22)
Science & U.S. Presidents
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Tue., Feb. 22 - National Brotherhood Day. (Feb. 22 - coincides with George Washington's birthday)

* Tue., Feb. 22 - World Spay Day. (Last Tuesday of every February)

* Wed., Feb. 23, 5:32 p.m. EST / 22:32 UTC - Primary Moon Phase: Last Quarter.

* Thur., Feb. 24 - Introduce a Girl to Engineering Day. (Thursday of National Engineering Week)

* Thur., Feb. 24 (1914) - Anniversary: Concept of the Projection Planetarium. (Feb. 24)

* Thur., Feb. 24 - Digital Learning Day. (4th Thursday in February)

* Feb. 25, 26, 27 - National Girl Scout Cookie Weekend. (Last weekend of February / first weekend of March)

* Fri., Feb. 25 - Equilux when considering Civil Twilight (Dawn before sunrise and Dusk after sunset) - When considering Civil Twilight, the day when daylight and darkness, both, have the same length of hours and minutes. Occurs twice each year, approximately 23 days before the Vernal Equinox and 23 days after the Autumnal Equinox. (Feb. 25-26, Oct. 15)

* Sat., Feb. 26, 5:00 p.m. EST / 22:00 UTC - Moon at Perigee: 228,533.48942 statute miles / 367,789 kilometers.

* Sun., Feb. 27 - International Polar Bear Day. (Feb. 27)

* Sun., Feb. 27, 4:00 a.m..EST / 9:00 UTC - Mars 4 degrees north of the Moon.

* Mon., Feb. 28 - Rare Disease Day. (Last day of February: Feb. 28 or 29)

* Mon., Feb. 28 - Mercury at Aphelion.

* Mon., Feb. 28, 3:00 p.m..EST / 20:00 UTC - Mercury 4 degrees north of the Moon.

* Mon., Feb. 28, 7:00 p.m. EST / March 1, 0:00 UTC - Saturn 4 degrees north of the Moon.

* Feb. 29 to March 1 (1504 Feb. 29 to March 1) - Anniversary: Total Lunar Eclipse used by Christopher Columbus, to scare the natives of Jamaica into providing food and other provisions for his sailors. (Feb. 29 to March 1)
Also see first recorded lunar eclipse in continental North America.

SPECIAL NOTES:
(1) All astronomical or sky observations are always weather-permitting.
(2) For calendar entries which describe a relationship between two or more celestial objects, unless otherwise noted all relationships between celestial objects are visual relationships as seen from Earth only.

* Feb. 22 to March 3, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Feb. 27 to March 5 - Montessori Education Week. (Last week of February / first week of March)

* Feb. 27 to March 5 - America Saves Week. (Last week of Feb. - Same week as Military Saves Week)

* Feb. 27 to March 5 - Military Saves Week. (Last week of Feb. - Same week as America Saves Week)

* Mon., Feb. 28, 7:00 p.m. EST / March 1, 0:00 UTC - Saturn 4 degrees north of the Moon.

* Tue., March 1 (1504 Feb. 29 to March 1) - Anniversary of total lunar eclipse used by Christopher Columbus, to scare the natives of Jamaica into providing food and other provisions for his sailors. (Feb. 29 to March 1)
Also see Mo first recorded lunar eclipse in continental North America.

* Tue., March 1 - Beginning of Meteorological Spring Season in Northern Hemisphere. (March 1)

* Tue., March 1 - Beginning of Autumn Season in Australia. (March 1)

* Tue., March 1 - St. David's Day. (March 1)

* Tue., March 1 - World Compliment Day. (March 1)

* Tue., March 1 - Mardi Gras / Fat Tuesday / Carnival Tuesday / Shrove Tuesday / Pancake Tuesday / Pancake Day. (Day before Ash Wednesday)

* Tue., March 1, 9:00 p.m. EST / March 2, 3:00 UTC - U.S. Presidential State of the Union Address, in Joint Session of U.S. Congress. (Annual, Except Year of New U.S. Presidential Admininstration: Tuesday in January, February, or March)

* Wed., March 2 - Read Across America sponsored by the National Education Association to motivate children to read, in addition to helping them master basic skills. (Annual--on or near March 2, birthday of Dr. Seuss)

* Wed., March 2 -
** Ash Wednesday
** Beginning of Lent. (First Wednesday in Lent, 46 days before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Wed., March 2 - World Maths Day. (First Wednesday in March)

* Wed., March 2, 8:00 a.m. EST / 13:00 UTC - Mercury 0.7 degree south of Saturn.

* Wed., March 2, 12:35 p.m. EST / 17:35 UTC - Primary Moon Phase: New Moon - Lunation #1227

* Thur., March 3 (1915) - Establishment of the National Advisory Committee for Aeronautics (NACA), the predecessor of the National Aeronautics and Space Administration (NASA). (March 3)

* Thur, March 3 - World Wildlife Day. (March 3)

* Fri., March 4 - World Engineering Day. (March 4)

* Fri., March 4 (1681) - Pennsylvania Charter Day - William Penn received charter, for what became the Commonwealth of Pennsylvania, from Great Britain's King Charles II on 1681 March 4. (March 4)

* Fri., March 4 (1793 until 1933, on the year immediately following the year of a U.S. Presidential Election) - U.S. Presidential Inauguration Day. (March 4)

* Fri., March 4 - National Grammar Day. (March 4)

* Fri., March 4 - Employee Appreciation Day. (First Friday of March)

* Sat., March 5 (1868) - Anniversary: Railway Air Brake patented by George Westinghouse in Pittsburgh. (March 5)

* Sat., March 5 - Open Data Day. (Feb. or March; 1st Sat. in March)

* Sat., March 5 (1946) - Anniversary: Winston Churchill's "Iron Curtain" Address. (March 5)

* Sat., March 5, 9:00 a.m. EST / 14:00 UTC - Jupiter in conjunction with the Sun (Jupiter not visible, even with a telescope).

* March 6 to 12 - Sleep Awareness Week®. (Coincides, each year, with conversion to Daylight Saving Time; the calendar week before the time change)

* March 6 to 12 - Teen Tech Week. (March: Second Week)

* March 6 to 12 - Wildfire Prevention Week. [Pennsylvania: Spring (Second week of March), Autumn]

* March 6 to 12 - National Consumer Protection Week. (First full week of March)

* Sun., March 6 (1869) - Professor Dimitri Ivanovich Mendeleev's first Periodic Table of the Elements was presented to, and published by, the Russian Chemical Society. (March 6)

* March 7 to 11 - Open Education Week. (First week of March)

* March 7 to 11 - National School Breakfast Week. (First school week of March)

* March 7 to 11 - World Orphan Week. (Feb. or March)

* Mon., March 7, 1:00 a.m. EST / 6:00 UTC - Uranus 0.8 degree north of the Moon; occultation: southwestern portion of Polynesia, southeastern portion of Melanesia, southeastern Australia, portions of eastern Antarctica.

* Tue, March 8 - International Women's Day. (March 8)

* Wed., March 9, 2:00 a.m. EST / 7:00 UTC - Asteroid and Dwarf Planet Ceres 0.3 degree north of the Moon; occultation: northern and western portions of Australia, eastern section of Indonesia, Papua New Guinea, northern section of Melanesia, Micronesia, northern portion of Polynesia (not including Hawaii).

* March 10 to April 12, September 24 through November 5 - Tsunami Preparedness Weeks. (mid-March through April, mid-September through early November)

* Thur., March 10 (1982) - 1982 date of first alignment of our Solar System's nine planets (including Pluto, which at that time was still considered a planet; Pluto is now designated a Dwarf Planet) since A.D. 1128. A 1974 book, The Jupiter Effect, had erroneously predicted several catastrophes to occur on this date in 1982, including a major earthquake on the San Andreas Fault in California. (March 10)

* Thur., March 10 (1876) - Anniversary: First successful telephone transmission of clear speech - when Alexander Graham Bell transmitted, "Mr. Watson, come here, I want to see you." Three days earlier, on March 7, Alexander Graham Bell received a U.S. patent for the telephone. (March 10)

* Thur., March 10, 5:45 a.m. EST / 10:45 UTC - Primary Moon Phase: First Quarter.

* Thur., March 10, 6:00 p.m. EST / 23:00 UTC - Moon at apogee: 251,200.48914 statute miles / 404,268 kilometers.

* Fri., March 11 - World Kidney Day. (March 11)

* Sat., March 12 - National Plant a Flower Day. (March 12)

* Sat., March 12 - World Day Against Cyber Censorship. (March 12)

* Sat., March 12 (1989) - Anniversary: Original proposal founding the World Wide Web on the Internet. (March 12).

* Sat., March 12 (1912) - Anniversary: Founding of the Girl Scouts of the United States of America. (March 12)

* Sat., March 12, 9:00 a.m. EST / 14:00 UTC - Venus 4 degrees north of Mars.

* March 13 to 19 - Sunshine Week / Transparency Week. (2nd full week of March; includes Freedom of Information Day on March 16).

* Sun., March 13 - Day of Planetaria. (2nd Sunday in March)

* Sun., March 13 (1781) - Anniversary: Planet Uranus discovery announced by Sir Frederick William Herschel. (March 13)

* Sun., March 13, 2:00 a.m. Prevailing Local Time (Standard Time) - DAYLIGHT SAVING TIME BEGINS - Beginning in 2007, EARLY DUE TO NEW FEDERAL LAW. Civil Time changes from 2:00 a.m. Standard Time to 3:00 a.m. Daylight Saving Time (Second Sunday in March, 2:00 a.m. Prevailing Local Time).
Some States to Abandon Daylight Saving Time ?
Science of Daylight Saving Time.

* Sun., March 13, 8:00 a.m. EDT / 12:00 UTC - Neptune in conjunction with the Sun (Neptune not visible, even with a telescope).

* Sun., March 13 (1938), 8:00 a.m. EST / 13:00 UTC (Daylight Saving Time did not exist, nation-wide, in 1938) - Anniversary: Beginning of the radio news program CBS World News Roundup, the longest-running, network news broadcast in America. (March 13)

* March 14 to 20 - Brain Awareness Week. (Second full week of March: Monday through Sunday)

* March 14 to 20 - Fix-a-Leak Week. (U.S. Environmental Protection Agency - third week of March: Monday through Sunday)

* Mon., March 14 - Pi Day, a holiday commemorating the mathematical constant π (pi). (March 14: 3.14)

* Mon., March 14 - Napping Day. (Monday after the annual beginning of Daylight Saving Time)

* Tue., March 15 - Ides of March. (March 15)
Also see: Ides of March article on StarDate.org.

* Tue., March 15 - Buzzards return to Hinckley, Ohio (Cleveland suburb). (March 15)

* Tue., March 15 (1892) - First patent granted for the invention of the escalator, which resulted in production of the first escalator installed on the Old Iron Pier at Coney Island in New York City in 1896. (March 15)

* Tue., March 15 - Equal Pay Day - This date symbolizes how far into the year women must work to earn what men earned in the previous year. (Late March, Early to mid-April)

* March 16, Sunset to March 17, Sunset - Purim - Jewish holiday that commemorates the saving of the Jewish people from Haman, in the ancient Persian Empire, who was planning to kill all the Jews.

* Wed., March 16 - Equilux - The actual day with equal hours and minutes of the Sun above the horizon, and equal hours and minutes of the Sun below the horizon. Occurs twice each year, approximately 3-to-4 days before the Vernal Equinox and 3-to-4 days after the Autumnal Equinox. (March 16, September 25)

* Wed., March 16 (1926) - Anniversary: American engineer, professor, physicist, and inventor Robert H. Goddard launched the first liquid-fueled (gasoline and liquid oxygen) rocket. (March 16)

* Wed., March 16 - Freedom of Information Day, the birthday of James Madison, who is widely regarded as the Father of the Constitution and as the foremost advocate for openness in government. (March 16)

* Thur., March 17 - St. Patrick's Day. (March 17)

* Thur., March 17, 6:00 p.m. EDT / 22:00 UTC - "Wet Dress Rehearsal" for NASA Artemis 1 space vehicle (SLS rocket and Orion space capsule) at Launch Pad 39B, Kennedy Space Center, Florida. The Wet Dress Rehearsal is the final test of the integrated system before launch and will be conducted at Launch Pad 39B. The rehearsal will run the Artemis I launch team through operations to load propellant into the rocket’s tanks and conduct a full launch countdown.
Also see: Roll-Out Thur.: NASA's New Moon Rocket / Fly Your Name Around Moon on Artemis I Tue., 2022 March 15.

* Fri., March 18 - Transit Driver Appreciation Day. (March 18)

* Fri., March 18 - Awkward Moments Day. (March 18)

* Fri., March 18, 3:18 a.m. EDT / 7:18 UTC - Primary Moon Phase: Full Moon - Worm Moon.

* Sat., March 19 (1918) - Anniversary: Standard Time Act authorized by the U.S. Congress, which legally established time zones in the United States. The law also established Daylight Saving Time (DST) to conserve energy during World War I, after being promoted by Pittsburgh business and civic leader Robert Garland. (March 19)
Previously, five North American time zones had been established by the American and Canadian railroads at precisely 12:00 Noon on 1883 November 18, upon a time signal sent over the telegraph from the Allegheny Observatory in Pittsburgh.

* Sat., March 19 - National Read To Me Day. (March 19)

* Sat., March 19 - St. Joseph's Day - Swallows return to Mission San Juan Capistrano, California. (March 19)

* Sat., March 19 - World Monopoly Day. (March 19)

* March 20 to 26 - Pennsylvania Medicine Cabinet Clean-up Week. (Week Beginning with the Vernal Equinox)

* March 20 to April 17 - Annual National Cherry Blossom Festival, Washington DC. (~ Vernal Equinox to mid-April)
PEAK BLOOM: March 22 to 25 - Predicted by the National Park Service.

* Sun., March 20 - Zodiacal Light visible, with difficulty, after evening twilight in the western sky of Earth's Northern Hemisphere (weather-permitting), for the next two weeks. (February, March)
Mars dust storms may cause mysterious 'zodiacal light' in Earth's night sky

* Sun., March 20 - Sun - Earth Day. (NASA: Day of, or near, the Vernal Equinox, the first day of Spring)

* Sun., March 20 - Hypatia Day / Women in Science Day. (March 20)

* Sun., March 20 - Nowruz - Persian New Year Spring Festival, celebrated on the Vernal Equinox, particularly in Iran.

* Sun., March 20, 11:33 a.m. EDT / 15:33 UTC - Vernal Equinox - Spring Season begins in Northern Hemisphere of Earth. (~March 20)
Beginning of New Year (Solar Calendar) in Afghanistan and Iran / Persia (Nowruz), including being a holy day for the Zoroastrian Religion, and Bahá'í Naw-Rúz, one of nine holy days of the Bahá'í Faith. (~ March 19, 20, 21)

* Sun., March 20, 6:00 p.m. EDT / 22:00 UTC - Mercury 1.3 degrees south of Jupiter.

* March 21 to 25 - Solar Week. (Mid-to-Late March, Mid-to-Late October)

* March 21 to 25 - Flood Safety Awareness Week. (Pennsylvania: March).

* March 21 to 27 - National Drug & Alcohol Facts Week. (End of March / Beginning of April; Previously 4th week of January)

* Mon., March 21 - Rosie The Riveter Day, commemorating the World War II poster, created by Pittsburgh's Westinghouse Electric and Manufacturing Corporation, which promoted women doing their part in the war effort. (March 21)

* Mon., March 21 - World Poetry Day. (March 21)

* Mon., March 21 - Kick Butts Day to prevent youth use of tobacco products. (March 21).

* Mon., March 21 (1617) - Anniversary: Funeral of Native American Pocahontas (a.k.a. Rebecca Rolfe) at age ~ 21. (March 21)

* Tue., March 22 - World Water Day. (March 22)

* Tue., March 22 - Diabetes Alert Day. (Fourth Tuesday of March)

* March 23 to April 1, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Wed., March 23 (1989) - National Near-Miss Day - Apollo Asteroid 1989FC, with a diameter of 300 meters, comes within 690,000 kilometers of the Earth in 1989. (March 23)

* Wed., March 23, 8:00 p.m. EDT / March 24, 0:00 UTC - Moon at perigee: 229,758.21204 statute miles / 369,760 kilometers.

* Fri., March 25 - Feast of the Annunciation observed nine full months before Christmas Day. The Feast of the Annunciation on March 25 (also the Vernal Equinox in the "original" Julian Calendar adopted by the second King of Rome, Numa Pompilius, in the 7th century B.C.) had been considered the beginning of the New Year, until the Gregorian Calendar reform, when Pope Gregory XIII chose the Feast of the Circumcision of Christ (Jan. 1) as the beginning of the New Year in the Roman Catholic Church's Liturgical Year. (March 25)

* Fri., March 25 - Lady Day in England, the first of the four traditional English quarter days, was New Year's Day up to 1752 when, following the move from the Julian Calendar to the Gregorian Calendar, January 1 became the start of the year. Lady Day (for the Virgin Mary) is the traditional name of the Feast of the Annunciation of the Blessed Virgin (March 25) in some English-speaking countries. (March 25)

* Fri., March 25 - National Medal of Honor Day. (March 25)

* Fri., March 25, 1:37 a.m. EDT / 5:37 UTC - Primary Moon Phase: Last Quarter.

* Sat., March 26, 8:30 to 9:30 p.m. Prevailing Local Time - Earth Hour annual environmental observance. (Saturday Late in March, 8:30 to 9:30 p.m. Prevailing Local Time)

* Sat., March 26 - Make Up Your Own Holiday Day. (March 26)

* March 27 to April 2 - National Week of the Ocean. (End of March, First Week of April)

* Sun., March 27, 11:00 p.m. EDT / March 28, 3:00 UTC - Mars 4 degrees north of the Moon.

* Mon., March 28, 6:00 a.m. EDT / 10:00 UTC - Venus 7 degrees north of the Moon.

* Mon., March 28, 8:00 a.m. EDT / 12:00 UTC - Saturn 4 degrees north of the Moon.

* Tue., March 29 (1848) - Anniversary: Ice jam stops flow of Niagara Falls for about 30 hours. (March 29)

* Tue., March 29, 9:00 a.m. EDT / 13:00 UTC - Venus 2 degrees north of Saturn.

* Wed., March 30 - Pennsylvania Female Veterans' Day. (March 30)

* Wed., March 30 - National Doctors' Day. (March 30)

* Wed., March 30 - World Bi-Polar Day, International Society for Bi-Polar Disorders, Pittsburgh. (March 30)

* Wed., March 30, 2:36 p.m. EDT / 18:36 UTC (Targeted Date) - Launch from Kennedy Space Center, Florida: Private Axiom-1 mission to the International Space Station, with a crew of four; operated by SpaceX for Axiom Space.

* Thur., March 31 - Last day of Calendar Year First Quarter. (March 31)

* Thur., March 31 (1851) - Anniversary: Jean Leon Foucault first demonstrates, to the general public, in the Pantheon in Paris, the Foucault Pendulum, which is a proof that the Earth rotates on its axis. He had invented the device on 1851 January 8 and first demonstrated it to scientists on 1851 February 3.
Near the end of his life, Jean Leon Foucault also developed the Siderostat-type Refractor Telescope. (March 31)

* Thur., March 31 (1918) - Anniversary: Daylight Saving Time (DST) established in the United States by the Standard Time Act, to conserve energy during World War I, after being promoted by Pittsburgh business and civic leader Robert Garland. However, DST was not popular, and the U.S. Congress repealed the law after the War. (March 31)

* Thur., March 31 - World Back-Up Day. (March 31)

* Thur., March 31 (1949) - Anniversary: RCA Victor releases first 45-RPM (revolutions-per-minute) phonograph record format. (March 31)

* Thur., March 31 - National Crayon Day. (March 31)

SPECIAL NOTES:
(1) All astronomical or sky observations are always weather-permitting.
(2) For calendar entries which describe a relationship between two or more celestial objects, unless otherwise noted all relationships between celestial objects are visual relationships as seen from Earth only.

* March 10 to April 12, September 24 through November 5 - Tsunami Preparedness Weeks. (mid-March through April, mid-September through early November)

* March 15 to May 3 - Lights Out for Birds during migration patterns to reduce bird casualties. (March 15 to May 3)

* March 20 to April 17 - Annual National Cherry Blossom Festival, Washington DC. (~ Vernal Equinox to mid-April)
PEAK BLOOM: March 22 to 25 - Predicted by the National Park Service.

* March 23 to April 1, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* March 27 to April 2 - National Week of the Ocean. (End of March, First Week of April)

* March 29 to April 2 - National Retirement Planning Week®. (Early to mid-April)

* April 1 to 3 - NASA Artemis I "Wet" Dress Rehearsal.
Also see: Roll-Out Thur.: NASA's New Moon Rocket / Fly Your Name Around Moon on Artemis I Tue., 2022 March 15.

* April 1 to 30 - National Kite Month. (April; plus in some years: some days in March and May)

* April 1, Sunset to May 1, Sunset - Month of observance of Ramadan in the Islamic religion. The month lasts 29 to 30 days, dependent on visual sightings of the New Crescent Moon.

* 2030 April 1 - U.S. Census Day - As required by the U.S. Constitution, the day once every ten years when a census is taken of all people living in the United States of America. (April 1 on years divisible by 10)

* Fri., April 1 - First day of calendar year Second Quarter. (April 1)

* Fri., April 1 - April Fools' Day - The end of a week-long (March 25 to April 1) New Year's festival in France during the Middle Ages, until January 1 was declared New Year's Day in 1564. After 1564, people in France who celebrated New Year's on April 1 were considered "April Fools." (April 1)

* Fri., April 1 (1960) - Anniversary of launch of first successful weather satellite, TIROS-1. (April 1)
Also see: Space Race To Create Quantum Satellite.

* Fri., April 1 (1905) - "SOS" became an International Radiotelegraph Distress Signal, effective 1908 July 1, after the signing of the first International Radiotelegraph Convention on 1906 November 3; "SOS" had first been adopted by German maritime radio regulations on 1905 April 1. In 1999, "SOS" was replaced by the Global Maritime Distress and Safety System. (April 1)

* Fri., April 1 (1954) - Anniversary of first broadcast of educational television station WQED-TV 13 in Pittsburgh, the nation's first community-supported television station. (April 1)

* Fri., April 1, 2:24 a.m. EDT / 6:24 UTC - Primary Moon Phase: New Moon - Lunation #1228

* April 2 to 8 - The Week of the Young Child™. (Mid-April)

* April 2 to 10 - National Robotics Week. (Early to mid-April)

* Sat., April 2 (1968) - Anniversary: World Premiere of the very influential, science-fiction motion picture, 2001: A Space Odyssey, which was presented in many theaters, including Pittsburgh's Warner Theater, in "Cinerama," an early wide-screen format that preceded the Omnimax format. (April 2)

* Sat., April 2 - Light It Up Blue, in North America, is dedicated to raising awareness of autism (April 2) / World Autism Awareness Day. (April 2)

* Sat., April 2 - Reconciliation Day. (April 2)

* Sat., April 2 - Park Day - Annual hands-on preservation event to help Civil War — and now Revolutionary War — battlefields and historic sites take on maintenance projects large and small. (First Saturday of April)

* Sat., April 2, 7:00 p.m. EDT / 23:00 UTC - Mercury at Superior Conjunction (Mercury not visible, even with a telescope).

* April 3 to 9 - National Library Week. (First, second, or third week of April)

* Sun., April 3 (1860) - Anniversary: Inception of the iconic Pony Express, which operated from 1860 April 3 to 1861 October 26 between St. Joseph, Missouri and Sacramento, California. The Pony Express reduced the time to deliver mail and messages between the eastern and western United States by 10 days. The Pony Express went bankrupt within 18 months, despite having a heavy financial subsidy. The Pony Express ended shortly after the completion of the Transcontinental Telegraph on 1861 October 24. (April 3)

* Sun., April 3 (1513) - Anniversary of the Discovery of Florida by Ponce de Leon. (April 3)

* Sun., April 3 - Good Deeds Day. (Sunday in late March or early to mid-April)

* Sun., April 3, 2:00 a.m. Prevailing Local Time (Daylight Saving Time) - DAYLIGHT SAVING TIME CONTINUES - Change in Federal law, thus that change from Standard Time to Daylight Saving Time occured the second Sunday in March: 2:00 a.m. Standard Time then became 3:00 a.m. Daylight Saving Time on the second Sunday in March. (Previously, first Sunday of April)
How Long Will DST Continue?
Some States to Abandon Daylight Saving Time ?
Science of Daylight Saving Time.

* Sun., April 3, 1:00 p.m. EDT / 17:00 UTC - Uranus 0.6 degree north of the Moon; occultation: South America (southern and eastern sections), Ascension Island (British territory), St. Helena (British territory), West Central Africa (edge).

* April 4 to 10 - National Public Health Week. (First week of April)

* Mon., April 4 (1968) - Anniversary: Assassination of American Baptist Minister and civil rights activist Dr. Martin Luther King, Jr. (April 4)
Dr. King's writing on how small the Earth is, compared to the great expanse of the Universe.

* Mon., April 4 - Land-Mine Awareness Day. (April 4)

* Mon., April 4, 6:00 p.m. EDT / 22:00 UTC - Mars 0.3 degree south of Saturn.

* Tue., April 5 - National Library Workers Day. (Tuesday of National Library Week)

* Wed., April 6 (2019) - Anniversary: GPS Week Number Roll-Over Event on Coordinated Universal Time (UTC) derived from GPS devices. The potential problem revolves around the way that GPS handles the week element of the data that forms part of the navigation signal; specifically the CNAV and MNAV message types. The week number is encoded into the data stream by a 10-bit field. A binary 10.-bit word can represent a maximum of 1,024 weeks, which is approximately 19.7 years. Each 19.7 year period is known in GPS terms as an “epoch”. At the end of each epoch the receiver resets the week number to zero and starts counting again – a new epoch begins. The first epoch started when GPS was launched in January 1980; hence the first epoch of GPS time came to an end on 1999 August 21. As we approach the end of the second epoch, which will fall on 2019 April 6, we may well see problems caused by the rollover. Some GPS receivers, or other systems that utilise the date and time function, may not be able to cope. (April 6)

* Wed., April 6 (1965) - Anniversary: launch of Early Bird satellite (Intelsat I), first commercial communications satellite placed in a geo-stationary orbit above the Earth. (April 6)

* Wed., April 6 (1917) - Anniversary: United States entry into World War I. (April 6)

* Wed., April 6 - Tartan Day - Celebration of Scottish heritage. (April 6)

* Wed., April 6 - Global Day of the Engineer. (Early April: First Wednesday of April)

* Wed., April 6 - National Bookmobile Day. (Wednesday of National Library Week)

* Wed., April 6 - Library Giving Day. (First Wed. of April)

* Wed., April 6 - National Walking Day / Move More in April. (First Wednesday of April)

* Wed., April 6, 5:00 a.m. EDT / 9:00 UTC - Asteroid & Dwarf Planet 1 Ceres 0.2 degree north of the Moon; occultation: Madagascar, Africa (eastern portion), India (southern & eastern portions), majority of Southeast Asia, China (southeast portion), Papua New Guinea, Micronesia (majority).

* Wed., April 6, 12:05 p.m. EDT / 16:05 UTC - Scheduled launch of first, private astronaut mission to the International Space Station: Axiom Mission 1, using the SpaceX Crew Dragon vehicle.
NASA-TV Live-Stream Web-Cast of Launch.

* Thur., April 7 - Teen Literature Day. (Thursday of National Library Week)

* Thur., April 7 - World Health Day. (April 7)

* Thur., April 7 - National Alcohol Screening Day (Early April: April 7)

* Thur., April 7 - No Housework Day. (April 7)

* Thur., April 7, 3:00 p.m. EDT / 19:00 UTC - Moon at apogee: 251,306.12225 statute miles / 404,438 kilometers.

* Fri., April 8 (1920) - Anniversary: Death of Astronomer, Educator, and Maker of Telescopes and Precise Scientific Instruments, Dr. John A. Brashear. (April 8)

* Fri., April 8 (1960) - Anniversary: Project Ozma -The first major project in the Search for Extraterrestrial Intelligence (SETI), begun by National Radio Astronomy Observatory (NRAO) researcher Frank Drake pointing an 85-foot / 26-meter radio telescope dish at the NRAO facility at Green Bank, West Virginia toward Tau Ceti, a star similar to our Sun just 12 light-years away. (April 8)

* April 9 to 16 - Money Smart Week®. (Mid-April)

* Sat., April 9 (1865) - American Civil War ended with the surrender by Confederate General Robert E. Lee. (April 9)
Also see the Civil War Museum of the Andrew Carnegie Free Library and Music Hall in Carnegie, Pennsylvania.

* Sat., April 9 - Be My Neighbor Day Volunteer Day, in honor of Fred Rogers from the original PBS television show, Mister Rogers Neighborhood, produced by Pittsburgh's WQED-TV 13. (2nd Saturday in April)

* Sat., April 9, 2:48 a.m. EDT / 6:48 UTC - Primary Moon Phase: First Quarter.

* April 10 to 16 - U.S. CFTC’s SmartCheck Week - To Emphasize Continual Background Checks of Financial Professionals. (Second week of April)

* April 10 to 16 - Pan American Week. (Week of April 14, Pan American Day)

* April 10 to 16 - National Dog-Bite Prevention Week. (Second full week of April)

* April 10 to 18 - Holy Week. (Week of Palm Sunday through Holy Saturday; Traditionally, also including Easter Sunday, and possibly including Easter Monday)
Will Christians Agree to Fix the Date of Easter?

* Sun., April 10 - Palm Sunday. (Sunday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Sun., April 10 (1845) - Anniversary: The Great Pittsburgh Fire - While the Great Chicago Fire of 1871 is better known, this is a painting (1846) of the Great Pittsburgh Fire on 1845 April 10, by witness William Coventry Wall. Started on a very windy day by a woman who started an outdoor fire to heat wash water, which she had left unattended, the Great Pittsburgh Fire consumed one-third of this city of, then, more than 20,000 population (which already had four daily newspapers), representing around two-thirds of the wealth of the city (between $6 million and $12 million damage). While the fire destroyed 1,200 buildings and displaced 12,000 people, only two deaths were reported.

* Sun., April 10 (1996) - World record fastest wind gust on the Earth's surface (not related to a tornado) recorded by automated, unstaffed weather instrument station on Australia's Barrow Island during Tropical Cyclone Olivia: 253 miles per hour. (April 10)
Also see: Western and Northern Hemispheres' record fastest wind gust on the Earth's surface.

* Sun., April 10 - Siblings Day. (April 10)

* April 11 to 15 - National Work Zone Awareness Week. (Early to mid-April)

* Mon., April 11 - National Pet Day. (April 11)

* Mon., April 11, 11:00 p.m. EDT / April 12, 3:00 UTC - Asteroid 2 Pallas in Conjunction with the Sun (Pallas not visible, even with a telescope).

* Tue., April 12 (1961) - International Day of Human Space Flight - Anniversary of when Russia launched the first human into space and orbit of the Earth, Yuri Gagarin. (April 12)

* Tue., April 12 (1981) - First launch of an American Space Shuttle (STS), Columbia. (April 12)

* Tue., April 12 (1934) - World record fastest wind gust on the Earth's surface (not related to a tornado), until 1996 April 10, recorded at Mount Washington Weather Observatory, New Hampshire: 231 miles per hour. This is still the fastest wind gust on the Earth's surface (not related to a tornado) recorded in the Western Hemisphere and in the Northern Hemisphere, and the fastest wind gust on the Earth's surface (not related to a tornado) observed by humans. (April 12)
Also see: World record fastest wind gust on the Earth's surface.

* Tue., April 12 (1955) - Anniversary - Announcement: Successful polio vaccine, developed by University of Pittsburgh virology researcher Dr. Jonas Salk. (April 12)

* Tue., April 12 (1861) - The American Civil War began. (April 12)
Also see the Civil War Museum of the Andrew Carnegie Free Library and Music Hall in Carnegie, Pennsylvania.

* Tue., April 12 - Drop Everything and Read Day in honor of the birthday of children's author Beverly Cleary. (April 12)

* Tue., April 12, 4:00 p.m. EDT / 20:00 UTC - Jupiter 0.1 degree north of Neptune.

* Wed., April 13 - Holy Wednesday. (Wednesday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Wed., April 13 - Citizen Science Day. (April 13)

* Wed., April 13 - Scrabble Day. (April 13)

* Wed., April 13 - FND International Awareness Day - Regarding Functional Neurological Symptom Disorder (FNsD). (April 13)

* Wed., April 13 - Mercury at Perihelion.

* Wed., April 13 (1970), 10:07:53 p.m. EST / April 14, 3:07:53 UTC
(SPECIAL NOTE: In 1970, Daylight Saving Time did not begin until April 26, the last Sunday in April.) -
Anniversary: Apollo 13 Accident.
Apollo 13 aborted mission to land on the Moon after an oxygen tank explosion severely crippled the spacecraft. After a 1970 April 11 launch, the three astronauts, James A. Lovell, John A. "Jack" Swigert, and Fred W. Haise, returned safely to Earth on 1970 April 17. Due to the plan to return Apollo 13 to Earth, after going around the Moon, the Apollo 13 astronauts flew farther from Earth than any other humans, to-date. (April 13)

* April 14 to 15 (1865) - Assassination of U.S. President Abraham Lincoln. (April 14 to 15)
Also see the Civil War Museum of the Andrew Carnegie Free Library and Music Hall in Carnegie, Pennsylvania.

* Thur., April 14 (1845) - First Light using a now-historic 11-inch Merz und Mahler Telescope at the Cincinnati Observatory, America's first public observatory. (April 14)

* Thur., April 14 - Maundy Thursday / Holy Thursday. (Thursday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Thur., April 14 - Pan American Day. (April 14)

* Thur., April 14 (1970), 7:21 p.m. EST / April 15, 0:21 UTC
(SPECIAL NOTE: In 1970, Daylight Saving Time did not begin until April 26, the last Sunday in April.) -
Due to the Moon being nearly at apogee (farthest point in lunar orbit from the Earth, for month of 1970 April), the Apollo 13 astronauts became the first humans to travel farther from the Earth than any other humans, which is still true to-date; distance from Earth: 248,655 mile / 400,171 kilometers. This record was necessary, due to the abort of the lunar landing mission of Apollo 13. (April 14)

* Thur., April 14 (1912), 11:40 p.m. (Ship Time) - Anniversary of the sinking of the RMS Titanic on the ship's maiden voyage. (April 14)
Also see: Titanic Sunk by the Moon?

* April 15, local sunset to April 23, local sunset - Jewish festival of Passover.

* Mid-April - Big Night for Spring Peepers - First night (or first several nights), after the ground has thawed, with temperatures ~ +40 to +50 degrees Fahrenheit (F), and it rains, when there is a massive migration of frogs and salamanders in New Hampshire and other New England states. (Mid-April)

* Fri., April 15 - Good Friday. (Friday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Fri., April 15 - SPECIAL NOTE: DEADLINE FOR FEDERAL TAX RETURNS EXTENDED TO MONDAY, 2022 APRIL 18 - Tax Day (USA) - Individual Federal tax returns due or postmarked by end of day. (April 15, unless delayed by a holiday)

* Fri., April 15 (1947) - Jackie Robinson Day honors the day in 1947 of Jackie Robisnon's debut in Major League Baseball. Later on, Jackie Robinson wrote a column for the Pittsburgh Courier. (April 15)

* Fri., April 15, 12:00 Noon LOCAL SUN TIME - In the middle of April of each year, Sundial Time and Local Clock Time are in general agreement, for locales which lie on a Time-Zone Meridian (such as Philadelphia, which lies on the Eastern Time Zone Meridian - or Greenwich, England, which lies on the Greenwich Time Zone Meridian or Prime Meridian). (~ April 15)

* Fri., April 15 - Average beginning of the Growing Season for approximate Earth Northern Latitude +40 degrees (including the Pittsburgh Quad-State Region: Western Pennsylvania, Eastern Ohio, Northern West Virginia, and Western Maryland) except at the higher elevations. (April 15)

* April 16, Nov. 26 - Record Store Day. (Second or third Saturday in April & Black Friday in November)

* Sat., April 16 - Holy Saturday. (Saturday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Sat., April 16 - National Junior Ranger Day. (Saturday in National Park Week)

* Sat., April 16 - National Healthcare Decisions Day. (April 16)

* Sat., April 16 - National Stress Awareness Day. (April 16)

* Sat., April 16 - World Voice Day. (April 16)

* Sat., April 16, 2:55 p.m. EDT / 18:55 UTC - Primary Moon Phase: Full Moon - Pink Moon.

* April 17 to 23 - Earth Week. (Week leading to and including Earth Day, April 22: April 16 to 22)

* April 17 to 23 - National Environmental Education Week. (EE Week - Week near Earth Day: April 22)

* April 17 to 23 - National Volunteer Week. (Mid-April)

* April 17 to 23 - National Minority Cancer Awareness Week. (Third week of April)

* Sun., April 17 (Sunrise in Pittsburgh: 6:39 a.m. EDT / 10:39 UTC) - Easter Sunday. [46 days after Ash Wednesday; the first Sunday after the full moon (the Paschal Full Moon) following the March equinox (ecclesiastically, the equinox is reckoned to be on March 21, even though the equinox occurs, astronomically speaking, on March 20 in most years)]
Will Christians Agree to Fix the Date of Easter?

* April 17 to 24 - Orthodox Holy Week. (Week of Orthodox Palm Sunday through Orthodox Holy Saturday; Traditionally, also including Orthodox Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Sun., April 17 - Orthodox Palm Sunday. (Sunday before Orthodox Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* April 17 to 25 - National Park Week. (Third or fourth week of April, including both weekends)

* Sun., April 17 - International Bat Appreciation Day. (April 17)

* Sun., April 17 - World Hemophilia Day. (April 17)

* Sun., April 17 - Blah, Blah, Blah Day. (April 17)

* April 18 to 22 - Severe Weather Awareness Week. (Pennsylvania: Mid-April)

* Mon., April 18 - Easter Monday. (Monday after Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Mon., April 18 - Patriots' Day. (Third Monday of April)

* Mon., April 18 - SPECIAL NOTE: DEADLINE FOR FEDERAL TAX RETURNS EXTENDED TO MONDAY, 2022 APRIL 18 - Tax Day (USA) - Individual Federal tax returns due or postmarked by end of day. (April 15, unless delayed by a holiday)

* Mon., April 18 - Electrical Lineman Appreciation Day. (April 18)

* Mon., April 18, 9:00 a.m. EDT / 13:00 UTC - Mercury 2 degrees north of Uranus.

* Tue., April 19 (1965) - Anniversary: Commencement by WINS-AM 1010, New York City, of, what is now, the oldest continuously operating all-news radio station in the United States: Link 1 *** Link 2 (April 19)

* Tue., April 19, 11:00 a.m. EDT / 15:00 UTC - Moon at Perigee: 226,889.34125 statute miles / 365,143 kilometers.

* Wed., April 20 - Orthodox Holy Wednesday. (Wednesday before Orthodox Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Wed., April 20 (1946) - Dissolution of the League of Nations; succeeded by the United Nations (UN), which was formed on 1945 October 24. (April 20)

* Wed., April 20, Evening - l World Night in Defence of the Starlight. (April 20, Evening)

* NO EARLIER THAN Wed., April 20, 6:37 a.m. EDT / 10:37 UTC - Scheduled launch of NASA's SpaceX Crew-4 mission to the International Space Station.
More information
NASA-TV Live-Stream Web-Cast of Launch.

* Thur., April 21 - Generally, last day to expect frost in areas around +40 degrees north latitude, such as Pittsburgh. (April 21)

* Thur., April 21 - Orthodox Maundy Thursday / Holy Thursday. (Thursday before Orthodox Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Thur., April 21 - National Take Our Daughters and Sons To Work Day. (Fourth Thursday of April)

* April 22 to 30 - International Dark-Sky Week. (Week of the New Moon in April)

* April 22 to May 1, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: Monthly Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* Fri., April 22 (1970) - Anniversary: Earth Day. (April 22)

* Fri., April 22 - Orthodox Good Friday / Holy Friday. (Friday before Orthodox Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Fri., April 22 (1994) - Anniversary - Announcement: Discovery of the Top Quark, the most massive of all observed elementary particles. (April 22)

* Fri., April 22, 2:00 p.m. EDT / 18:00 UTC (Best viewing: Midnight to Dawn, weather-permitting) - Peak of Lyrid Meteor Shower. (April 22)

* Sat., April 23 - Orthodox Holy Saturday. (Saturday before Orthodox Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Sat., April 23 - World Laboratory Day. (April 23)

* Sat., April 23 - World Book and Copyright Day / World Book Night. (April 23)

* Sat., April 23, 7:56 a.m. EDT / 11:56 UTC - Primary Moon Phase: Last Quarter.

* April 24 to 30 - National Sky Awareness Week (SAW), a week set-aside to “look up” and to see the myriad of cloud patterns and formations that grace the sky. (Last full week of April)

* April 24 to 30 - Arbor Week. (Last week of April, including Arbor Day on last Friday of April)

* April 24 to 30 - Preservation Week for library and archive materials. (Last week of April)

* April 24 to 30 - National Infertility Awareness Week®. (Last week of April)

* April 24 to 30 - Administrative Professionals Week. (Last full week of April)

* April 24 to 30 - National Re-entry Week. (Last week of April)

* April 24 to 30 - National Crime Victims' Rights Week. (Mid-to late April)

* April 24 to 30 - World Immunization Week. (Last week of April: April 24 to 30)

* April 24 to 30 - National Infant Immunization Week (NIIW). (Mid-to-late April)

* Sun., April 24 (1990) - Anniversary: Launch of Hubble Space Telescope (April 24).

* Sun., April 24 (1800) - Anniversary: Library of Congress established by an act of the U.S. Congress. (April 24)

* Sun., April 24 (Sunrise in Pittsburgh: 6:29 a.m. EDT / 10:29 UTC) - Orthodox Easter Sunday. [46 days after Orthodox Ash Wednesday; the first Sunday after the full moon (the Paschal Full Moon) following the March equinox (ecclesiastically, the equinox is reckoned to be on March 21, even though the equinox occurs, astronomically speaking, on March 20 in most years)]
Will Christians Agree to Fix the Date of Easter?

* Sun., April 24 (1915) - Armenian Genocide Remembrance Day. (April 24)

* Sun., April 24, 5:00 p.m. EDT / 21:00 UTC - Saturn 5 degrees north of the Moon.

* Mon., April 25 (1953) - DNA Day - Commemorates the day in 1953 when James Watson, Francis Crick, Maurice Wilkins, Rosalind Franklin, and colleagues published papers in the journal Nature on the structure of DNA. (April 25)

* Mon., April 25 - World Penguin Day. (April 25)

* Mon., April 25 - World Malaria Day. (April 25)

* Mon., April 25, 6:00 p.m. EDT / 22:00 UTC - Mars 4 degrees north of the Moon.

* Tue., April 26 (1920) - The 1920 Great Debate on the Scale of the Universe between Harlow Shapley of the Mount Wilson Observatory (who gave the keynote address at the 1941 dedication of the rather unique 10-inch Siderostat-Type Refractor Telescope at Pittsburgh's original Buhl Planetarium and Institute of Popular Science) and Allegheny Observatory Director Heber D. Curtis. (April 26)

* Tue., April 26 - World Intellectual Property Day. (April 26)

* Tue., April 26 - Help a Horse Day. (April 26)

* Tue., April 26, 6:00 p.m. EDT / April 27, 2:00 UTC - Venus 4 degrees north of the Moon.

* Wed., April 27 - Administrative Professionals Day. (Wednesday of Administrative Professionals' Week, last full week of April)

* Wed., April 27, 4:00 a.m. EDT / 8:00 UTC - Jupiter 4 degrees north of the Moon.

* Wed., April 27, 3:00 p.m. EDT / 19:00 UTC - Venus 0.01 degree south of Neptune.

* April 28 to May 6 (2001) - First Outer Space Tourist: Dennis Tito. (April 28 to May 6)

* April 28, 29 - Holocaust Remembrance Days (USA). (April 28, 29)

* Thur., April 28 - Holocaust Remembrance Day. (27th day of Nisan on the Hebrew Calendar; corresponds to different dates, each year, on the Gregorian Calendar).

* Thur., April 28 - Workers' Memorial Day. (April 28)

* Fri., April 29 - Arbor Day - National Arbor Day Foundation. (Last Friday of April)

* Fri., April 29 - Teach Children to Save Day. (Last Friday of April)

* Fri., April 29, 3:00 p.m. EDT / 19:00 UTC - Mercury 1.4 degrees south of the Pleiades Open Star Cluster (M45).

* April 30, Sept. 30 - National PrepareAthon ! Day - Day to emphasize preparation for disasters and emergencies. (April 30, Sept. 30)

* Sat., April 30 - Save the Frogs Day. (Last Saturday in April)
Also see news article.

* Sat., April 30 - World Healing Day. (Last Saturday of April)

* Sat., April 30, 10:00 a.m. to 2:00 p.m. Prevailing Local Time - National Prescription Drug Take-Back Day sponsored by the U.S. Drug Enforcement Administration. (Last Saturday in April)

* Sat., April 30 - International Jazz Day. (April 30)

* Sat., April 30, 3:00 p.m. EDT / 19:00 UTC - Venus 0.2 degree south of Jupiter.

* Sat., April 30, 4:28 p.m. EDT / 20:28 UTC - Primary Moon Phase: New Moon - Lunation #1229.
This second New Moon in one calendar month is sometimes referred to as a Black Moon.

* Sat., April 30, 4:41:25.8 p.m. EDT / 20:41:25.8 UTC - Time of Greatest Eclipse for Partial Solar Eclipse / Partial Eclipse of the Sun, visible in the southern portion of South America, small portion of the Antarctic Continent, as well as a portion of the South Pacific Ocean and small portion of the South Atlantic Ocean.
More information --- Link 1 (NASA) *** Link 2 *** Link 3 *** Link 4
NEVER LOOK DIRECTLY AT ANY SOLAR ECLIPSE / ECLIPSE OF THE SUN, UNLESS YOU HAVE THE PROPER EQUIPMENT AND PROPER TRAINING TO DO SO SAFELY !!!
SOLAR ECLIPSE / ECLIPSE OF THE SUN: TIPS FOR SAFE VIEWING

* Sun., May 1 - Traditional Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; approximate mid-way point in Spring season. (May 1)
Actual Cross-Quarter Day.

* Thur., May 5, 8:25 a.m. EDT / 12:25 UTC - Actual Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; mid-way point in Spring season (~May 5-6).
Traditional Cross-Quarter Day.

SPECIAL NOTES:
(1) All astronomical or sky observations are always weather-permitting.
(2) For calendar entries which describe a relationship between two or more celestial objects, unless otherwise noted all relationships between celestial objects are visual relationships as seen from Earth only.

* April 1, Sunset to May 1, Sunset - Month of observance of Ramadan in the Islamic religion. The month lasts 29 to 30 days, dependent on visual sightings of the New Crescent Moon.

* April 22 to May 1, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE - Annual Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* May 1 to 7 - Hurricane Preparedness Week. (May)

* May 1 to 7 - Choose Privacy Week. (May 1 to 7)

* May 1 to 7 - National Travel and Tourism Week. (First full week of May)

* May 1 to 7 - National Small Business Week. (End of April, beginning of May)

* May 1 to 7 - North American Occupational Safety and Health Week. (First full week of May)

* May 1 to 7 - Arson Awareness Week. (First full week of May)

* May 1 to 7 - Public Service Recognition Week (PSRW). (First full week of May)

* Sun., May 1 - Traditional Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; approximate mid-way point in Spring season. (May 1)
Actual Cross-Quarter Day.

* Sun., May 1 - Law Day. (May 1)

* Sun., May 1 - Loyalty Day. (May 1)

* Sun., May 1 (1971) - Anniversary: National Railroad Passenger Corporation - Amtrak (original nickname: Railpax), America's national passenger railroad system: Link 1 *** Link 2. (May 1)

* May 2 to 7 / Sept. 26 to Oct.1 - Astronomy Week. (Begins on the Monday preceding the Saturday designated as Astronomy Day). (April or May / September or October)

* May 2 to 6 - Small Worlds Week - NASA celebrates the Solar System's two smallest planets: Mercury and Mars. (First school-week of May)

* May 2 to 6 - National PTA Teacher Appreciation Week. (First full school-week of May)

* May 2 to 8 - Children's Book Week (Last week of April and / or first week of May, beginning on Monday; Moved from 2007 Nov. 12 to 18; 2019: Centennial).

* May 2 to 5 - National Small Business Week. (First business week of May)

* Mon., May 2, 10:00 a.m. EDT / 14:00 UTC - Mercury 1.8 degrees north of the Moon.

* Tue., May 3 - Sun Day. (May 3)

* Tue., May 3 - World Press Freedom Day (May 3).

* Tue., May 3 (1971) - Anniversary: National Public Radio (NPR) news program, "All Things Considered" (ATC). (May 3)

* Tue., May 3 - National Day of Prayer. (~ May 3)

* Tue., May 3 - National Teacher Day. (Tuesday of Teacher Appreciation Week)

* Tue., May 3 - World Asthma Day. (First Tuesday in May)

* Wed., May 4 - "Star Wars" Day - "May the Fourth Be With You." (May 4)

* Wed., May 4 - Bird Day - Created in 1894 in the Western Pennsylvania community of Oil City. (May 4)

* Wed., May 4 - Greenery Day / Japan Arbor Day. (May 4)

* Wed., May 4 - Bike to School Day. (First Wed. in May)

* Wed., May 4, 10:00 a.m. EDT / 14:00 UTC - Asteroid & Dwarf Planet Ceres 0.01 degree north of the Moon; occultation: northeastern portion of South America, Cape Verde Islands, Madeira (autonomous region of Portugal), North Africa, very southern portion of Europe, portion of the Middle East, western and southern sections of India.

* Thur., May 5 - National Astronaut Day. (May 5)

* Thur., May 5 - Password Day. (May 5)

* Thur., May 5 - Cinco de Mayo. (Mexico: May 5)

* Thur., May 5, 3:00 a.m. EDT / 7:00 UTC - Uranus in Conjunction with the Sun (Uranus not visible, even with a telescope).

* Thur., May 5, 9:00 a.m. EDT / 13:00 UTC - Moon at Apogee: 251,832.42365 statute miles / 405,285 kilometers.

* Thur., May 5, 8:25 a.m. EDT / 12:25 UTC - Actual Astronomical Cross-Quarter Day Beltaine, better known as May Day - Second traditional Astronomical Cross-Quarter Day of year; mid-way point in Spring season (~May 5-6).
Traditional Cross-Quarter Day.

* May 6 to 12 - National Nurses Week (from May 6, also known as National Nurses Day, through May 12, the birthday of Florence Nightingale, the founder of modern nursing).

* Fri., May 6 - National Nurses Day / National RN Recognition Day (May 6).

* Fri., May 6 - International Space Day: Link 1 *** Link 2. (First Friday in May)

* Fri., May 6 - Read Your Farmers’ Almanac In The Bathroom Day. (May 6)

* Fri., May 6 - Floyd Cooper Day in memory of award-winning illustrator and author of children's books Floyd Cooper. (May 6)

* Fri., May 6 - National Tourist Appreciation Day. (May 6)

* Fri., May 6 - Give Local America Day to raise money for local non-profit organizations. (First Monday or Tuesday or Friday of May)

* Fri., May 6, 4:00 a.m. EDT / 8:00 UTC (Best viewing: Midnight to Dawn, weather-permitting) - Peak of n-Aquarid (Eta Aquarid) Meteor Shower - remnants from Halley's Comet. (May 4 to 7)

* Saturday - May 7 / Oct.1 - Astronomy Day. [Saturday closest to First Quarter Primary Phase of the Moon, in April or May (Spring - Saturday of Astronomy Week) and in September or October (Autumn)]: Link 1 *** Link 2 *** Link 3 *** Link 4

* Sat., May 7 - National Wildfire Community Preparedness Day. (First Saturday in May)

* Sat., May 7 - National Scrapbooking Day. (First Saturday in May)

* Sat., May 7 - National Comic Book Day. (First Saturday in May)

* Sat., May 7 - National Train Day. (Celebrated on the Saturday closest to the anniversary of the driving of the Golden Spike for the completion of the First Transcontinental Railroad in the United States of America: 1869 May 10)

* May 8 to 14 - Bicycle Week / Bike-to-Work Week. (Second week of May)

* May 8 to 14 - Women's Health Week. (Week that begins on Mothers' Day)

* May 8 to 15 - National Hospital Week (Second week of May)

* May 8 to 15 - Food Allergy Awareness Week (FAAW). (Second week of May)

* Sun., May 8 - Mothers' Day. (Second Sunday in May)

* Sun., May 8 (1828) - World Red Cross and Red Crescent Day. (May 8)

* Sun., May 8 (1945) - Victory in Europe Day. (May 8)

* Sun., May 8, 8:00 p.m. EDT / May 9, :0:21 UTC - Primary Moon Phase: First Quarter.

* May 9 to 13 - Neuropathy Awareness Week. (Second full week of week-days in May)

* Mon., May 9 - Women's Checkup Day. (Monday after Mothers' Day - Monday of Women's Health Week)

* Tue., May 10 (1869) - Driving of the Golden Spike for the completion of the First Transcontinental Railroad in the United States of America. (May 10)

* Wed., May 11 - National Student Nurses Day. (Wednesday Of National Nurses Week - originally May 8)

* Wed., May 11 - National Third Shift Workers Day. (Second Wednesday of May)

* Thur., May 12 - National Lab Day. (May 12)

* Thur., May 12 - International Nurses Day, the birth date of pioneering nurse Florence Nightingale, and the end of the annual Nurses Week. (May 12)

* Thur., May 12 - Limerick Day. (May 12)

* Fri., May 13 (1611) - “Galileo Confirmation Day,” anniversary of the day Jesuit priests held a banquet in honor of Galileo Galilei, for his discovery of four moons orbiting the planet Jupiter. (May 13)

* Fri., May 13 - "Friday the 13th" superstition; debunking this superstition, purpose of character King Friday the 13th on popular PBS children's television series, Mister Rogers' Neighborhood (originated at WQED-TV channel 13 in Pittsburgh). (Friday the 13th)

* May 14 to 22 - Armed Forces Week. [USA: Second Saturday to Sunday of following week in May (ends the fourth Sunday if the month begins on a Sunday, as in 2016)]

* Sat., May 14 - International Migratory Bird Day. (Second Saturday in May)

* Sat., May 14 - Stamp-Out Hunger Food Drive. (Second Saturday of May)

* Sat., May 14 - World Fair Trade Day. (Second Saturday of May)

* May 15 to September 30 - Recreational Boating Season. (May 15 to Sept. 30)

* May 15 to 21 - National Police Week. [Week including National Peace Officers' Memorial Day (May 15)]

* May 15 to 21 - Emergency Medical Services (EMS) Week. (Third full week of May)

* May 15 to 21 - National Transportation Week / National Defense Transportation Week. [Week in which National Defense Transportation Day falls (Friday)]

* Sun., May 15 - Venus at Aphelion.

* Sun., May 15 - International Day of Families. (May 15)

* Sun., May 15 - National Peace Officers' Memorial Day. (May 15)

* May 16 to 20 - United for Infrastructure Week. (MId-May)

* May 16 to 20 - National Etiquette Week. (Third business week of May)

* May 16 to 22 - National Tire Safety Week.[End of May (third week, Monday to Sunday) / Beginning of June]

* Mon., May 16, 12:11:31 a.m. EDT / 4:11:31 UTC - Time of greatest eclipse for Total Lunar Eclipse / Total Eclipse of the Moon, visible throughout the Western Hemisphere as well as much of it visible in Euope and Africa. Link 1 (NASA) *** Link 2 (NASA) *** Link 3 *** Link 4
ALWAYS SAFE TO LOOK AT A LUNAR ECLIPSE / ECLIPSE OF THE MOON WITH THE NAKED-EYES (one-power), BINOCULARS, OR A TELESCOPE.

* Mon., May 16, 12:14 a.m. EDT / 4:14 UTC - Primary Moon Phase: Full Moon - Flower Moon.

* Tue., May 17, 7:00 a.m. to 8:00 p.m. EDT / 11:00 UTC to May 19, 0:00 UTC - Primary Election Day: Pennsylvania (Third Tuesday in May except during Presidential Election Years when it is held on the Fourth Tuesday in April).

* Tue., May 17, 11:00 a.m. EDT / 15:00 UTC - Moon at Perigee: 223,878.79782 statute miles / 360,298 kilometers.

* Tue., May 17, 7:00 p.m. EDT / 23:00 UTC - Mars 0.6 degree south of Neptune.

* Wed., May 18 - International Museum Day. (May 18)

* Wed., May 18 - Visit Your Relatives Day. (May 18)

* Wed., May 18 - Emergency Medical Services for Children (EMSC) Day. [Wednesday of Emergency Medical Services (EMS) Week]

* Thur., May. 19 - Scheduled test flight of NASA’s Boeing Orbital Flight Test-2 mission to the International Space Station (ISS). Second uncrewed flight of the United Launch Alliance’s (ULA) CST-100 Starliner spacecraft, on an Atlas V rocket, for NASA’s Commercial Crew Program. Launch will occur from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida.
NASA-TV Live-Stream Coverage of Launch

* Thur., May 19 - National May Ray Day This is a day to be outside, enjoying the sunshine and soaking up some rays from our nearest star. (May 19)

* Thur., May. 19 - Hepatitis Testing Day. (May 19)

* Thur., May 19 - Global Accessibility Awareness Day. (Third Thursday in May)

* Fri., May 20 - World Bee Day. (May 20)

* Fri., May 20 - Bike-to-Work Day. (Third Friday in May)

* Fri., May 20 - National Defense Transportation Day. (Third Friday in May - Friday of National Defense Transportation Week)

* Fri., May 20 (1877) - Anniversary: The Duquesne Incline cable car railway in Pittsburgh. (May 20)

* Fri., May 20 (1932) - Anniversary: Amelia Earhart became first aviatrix to fly solo across Atlantic Ocean. (May 20)

* Fri., May 20 - Weights and Measures Day. (May 20)

* Fri., May 20 - Endangered Species Day. (May 20)

* Fri., May 20 - Food Revolution Day. (May 20)

* Fri., May. 20 - Wear Your Life-Jacket to Work Day. (Friday before the beginning of Safe Boating Week)

* May 21 to 30, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE - Annual Globe at Night campaign, to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations on-line to a world map.

* May 21 to 27 - National Safe Boating Week in the beginning of the Recreational Boating Season. (First full week before Memorial Day Weekend)

* Sat., May 21 - Armed Forces Day. (USA: Third Saturday in May)

* Sat., May 21 (1881) - Founding of the American Red Cross. (May 21)

* Sat., May 21 (1927) - Charles Lindbergh completes first solo trans-Atlantic flight and first non-stop flight between the Americas and main-land Europe, when landing in Paris in his Spirit of St. Louis airplane. (May 21)

* Sat., May 21 - World Day for Cultural Diversity for Dialogue and Development. (UN: May 21)

* Sat., May 21 - National Day of Service. (May 21)

* Sat., May 21, 3:00 p.m. EDT / 19:00 UTC - Mercury in Inferior Conjunction (Mercury not visible, even with a telescope).

* Sun., May 22 - National Maritime Day. (May 22)
Pittsburgh's original Buhl Planetarium and Institute of Popular Science displayed the largest Mercator's Projection Map of the World, originally produced by the U.S. Maritime Commission for display at the 1939 World's Fair in New York City.

. * Sun., May 22, 1:00 a.m. EDT / 5:00 UTC - Saturn 4 degrees north of the Moon.

* Sun., May 22, 2:43 p.m. EDT / 18:43 UTC - Primary Moon Phase: Last Quarter.

* Mon., May 23 - World Turtle Day. (May 23)

* Mon., May 23 - World Crohn's and Colitis Day. (May 23)

* Mon., May 23 - "143" Day - Day of Kindness. "143" is short-hand created by Mister Rogers, of the iconic PBS children's television program Mister Rogers' Neighborhood (produced at WQED-TV 13, Pittsburgh), meaning "I love you."

* Tue., May 24 - Victoria Day - In Canada, informally considered the beginning of the Summer season. (Last Monday before May 25; the Monday between May 18 and 24)

* Tue., May 24, 3:00 p.m. EDT / 19:00 UTC - Mars 3 degrees north of the Moon.

* Tue., May 24, 8:00 p.m. EDT / May 25, 0:00 UTC - Jupiter 3 degrees north of the Moon.

* Wed., May 25 (1961) - Anniversary: When U.S. President John F. Kennedy, in a special speech before a joint session of the U.S. Congress, proposes a new national goal: "First, I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to the earth." (May 25)

* Wed., May 25 - National Missing Children's Day. (May 25)

* Thur., May 26 - National Senior Health & Fitness Day. (Last Wednesday in May)

* Thur., May 26 - Christian Feast of the Ascension. (Thursday: 40th day of Easter)

* Thur., May 26, 11:00 p.m. EDT / May 27, 3:00 UTC - Venus 0.2 degree north of the Moon; occultation: southern portion of Madagascar, majority of Southeast Asia, south-east portion of China, majority of Micronesia.

* Fri., May 27, 12:29 p.m. Hawaii - Aleutian Standard Time (HAST) / 6:29 p.m. EDT / 22:29 UTC - Time in Honolulu, the state capital of Hawaii, of twice-annual Lāhainā Noon, the time whens the Sun Venappears at the Zenith in the sky [directly overhead--with no solar shadow visible (weather-permitting)] at Local Solar Noon; Lāhainā Noon can only occur in the Tropics, in locations between the Tropic of Cancer and the Tropic of Capricorn on the world globe. (~May 27, ~July 16):
Link 1 *** Link 2.

* Fri., May 27 - Mercury at Aphelion.

* Sat., May 28 - Don't Fry Day - The National Council on Skin Cancer Prevention Encourages Sun Safety Awareness. (Friday before Memorial Day).

* Sat., May 28, 10:00 a.m. EDT / 14:00 UTC - Uranus 0.3 degree north of the Moon; occultation: Easter Island (territory of Chile), majority of South America, Cape Verde Islands, majority of West Africa.

* Sat., May 28, 8:00 p.m. EDT / May 29, 0:00 UTC - Mars 0.6 degree south of Jupiter.

* May 29 to June 4 - Black Birders Week. (End of May / Beginning of June)

* Sun., May 29 (1919) - Results from the 1919 May 29 Total Solar Eclipse experiment confirmed Albert Einstein's General Theory of Relativity. (May 29)

* Sun., May 29 - 529 College Savings Programs Day. (May 29)

* Sun., May 29, 8:13 p.m. EDT / May 30, 0:13 UTC - Manhattan-Henge - View of Half Sun on the Manhattan, New York City, east--west street grid: Link 1 *** Link 2. (May 29, July 13)

* May 30 to June 5 - Camping & Caravanning Week. [End of May (last week) / Beginning of June]

* Mon., May 30, 8:12 p.m. EDT / May 31, 0:12 UTC - Manhattan-Henge - View of Full Sun on the Manhattan, New York City, east--west street grid: Link 1 *** Link 2. (May 30, July 12)

* Mon., May 30 - Decoration Day. (USA: May 30)
Now observed as Memorial Day. (USA: Last Monday in May)

* Mon., May 30 - Memorial Day. (USA: Last Monday in May)
Originally observed as Decoration Day. (USA: May 30)

* Mon., May 30, 7:30 a.m. EDT / 11:30 UTC - Primary Moon Phase: New Moon - Lunation #1230.

* Tue., May 31 - World No Tobacco Day (WNTD). (May 31)

* March 15 to May 31, Sept. 1 to Nov. 15, Midnight to 6:00 a.m. Local Prevailing Time - Lights-Out Program to Protect Migratory Birds - Commercial building owners, particularly for tall buildings in large cities, are encouraged to dim their building lights at night to aid migrating birds. (March 15 to May 31, Sept. 1 to Nov. 15)

Astronomy Calendar for A.D. 2022
(Includes 2022 June through December)