Astronomical Calendar - A.D. 2017

Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.


Authored By Glenn A. Walsh *** Sponsored By Friends of the Zeiss
Electronic Mail: < astrocalendar@planetarium.cc > *** Internet Web Cover Page: < http://www.planetarium.cc >
This Internet Web Page: < http://buhlplanetarium4.tripod.com/astrocalendar/2017.html >
SpaceWatchtower Blog
2017 January

Internet Web Site Master Index for the History of
The Buhl Planetarium and Institute of Popular Science, Pittsburgh

SpaceWatchtower Blog


ASTRONOMICAL / CALENDAR EVENTS --

A.D. 2017

January ** February ** March

April ** May ** June

July ** August ** September

October ** November ** December


2017

Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days

Chronological Cycles and Eras

Astro Calendar
Current Month

Astro Calendar
Archives


Constellations
For Year

Star Charts
For Year

Moon Phases:
Archive * 2017 * Today

Next 27.32166 Days (Orbital Period)
(Scroll to bottom of page)

Planets, Stars, Sky Events:
Today *** This Week

Solar System *** Archive

Occultations:

Archive * 2017

10,000-Year
Calendar

Astronomy Links

Science Links

Astronomical Glossary
Click here for links to the Moon, planets, star clusters, stars, and other astronomical terms referred to in this Astronomical Calendar.

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days - Archive

(Actual Dates and Times - Source: Eric G. Canali, former Floor Manager of Pittsburgh's original Buhl Planetarium and Institute of Popular Science and Founder of the South Hills Backyard Astronomers amateur astronomy club)

* Mon., 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.

* Fri., Feb. 3, 5:36 p.m. EST / 22:36 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.

* Mon., March 20, 6:29 a.m. EDT / 10:29 UTC - Vernal Equinox - Season of Spring begins in Earth's Northern Hemisphere: beginning of New Year (solar calendar) in Afghanistan and Iran. (~March 20)

* Mon., 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.

* Fri., May 5, 3:26 p.m. EDT / 19:26 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.

* Wed., June 21, 12:24 a.m. EDT / 4:24 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.

* Sat., 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).
Actual Cross-Quarter Day.

* Sun., Aug. 6, 8:13 p.m. EDT / Aug. 7, 0:13 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.

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

* Fri., Sept. 22, 4:02 p.m. EDT / 20:02 UTC - Autumnal Equinox - Season of Autumn begins in Earth's Northern Hemisphere. (~Sept. 22)
Also see: Harvest Moon.

* Sat., Oct. 31 / Sun., Nov. 1 / Mon., 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).

What is a "Cross-Quarter Day" ?
What is the Astronomical significance of
Halloween, All-Saints Day, and All-Souls Day?
Link 1 *** Link 2 *** Link 3 *** Link 4
Actual Cross-Quarter Day.

* Mon., Nov. 6, 1:15 p.m. EST / 17:15 UTC - Actual Astronomical Cross-Quarter Day (fourth and last actual cross-quarter day of the year: ~Nov. 6-7).
Traditional Cross-Quarter Day.

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

* Thur., Dec. 21, 11:28 a.m. EST / 16:28 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.

Chronological Cycles and Eras Corresponding to Anno Domini (A.D.) 2017 or 2017 Common Era (C.E.) - Archive

Unless otherwise indicated, all dates are given in terms of the Gregorian Calendar.
For recent years, January 14 of the Gregorian Calendar corresponds to January 1 of the Julian Calendar.

Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.
Epact: 2.
Golden Number (Lunar Cycle): IV.
Julian Period (Year of): 6730.
Roman Indiction: 10.
Solar Cycle (28-year cycle of the Julian calendar): 10.

Byzantine Year 7526 Begins Sept. 14.
Jewish Year (A.M.) 5778 Begins at Sunset, Sept. 20.
Chinese Year of the Rooster 4715 Begins Jan. 28.
Roman A.U.C. (Dates from the founding of the City of Rome) Year 2770 Begins Jan. 14.
Nabonassar Year 2766 Begins April 23.
Japanese (Heisei) Year 2677 - Period or Era 29 Begins January 1.
Grecian Year (Selucidae) 2329 Begins Sept. 14 (or Oct. 14).
Indian Year (Saka) 1939 Begins March 22.
Diocletian Era (Era of the Martyrs) Year 1734 Begins Sept. 11.
Islamic (Hegira) Year 1439 Begins at first viewing of lunar crescent (New Moon) on evening of Sept. 20.

NEWS: Astronomy, Space, Science

History of Buhl Planetarium and Institute of Popular Science, Pittsburgh


A.D. 2017

Astronomical Calendar: 2017 January
Monthly Observances This Month

* Quadrantid Meteor Shower: Jan. 3 to 4

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


* Nov. 1 to April 30 - Use of life jackets by every person on a small boat (less than 16 feet in length), during cold-weather months, is mandatory. (Nov. 1 to April 30)

* Sat., 2016 Dec. 31 - Make Up Your Mind Day. (Dec. 31)

* Sat., 2016 Dec. 31 - Eve of New Year's Day (Traditional). (Dec. 31)

* Sat., 2016 Dec. 31, 6:59:60 p.m. EST / 23:59:60 UTC - Positive 'Leap Second' added to the civil time scale, to help keep clocks synchronized with the slowing rotation rate of the Earth. (Periodically: last additional second of last minute of June 30 and / or December 31)

* Sat., 2016 Dec. 31, 7:00:00 p.m. EST / 2017 Jan. 1, 00:00:00 UTC - Marks the beginning of the New Year by the Coordinated Universal Time scale, the time scale used by many scientists. (Dec. 31)

* Sun., 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)

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

* Sun., 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)

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

* Sun., Jan. 1, 12:00:00 Midnight (00:00:00) 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)

* Sun., Jan. 1, 2:00 a.m. EST / 7:00 UTC - Mars 0.02 degree south of Neptune.

* Mon., Jan. 2 - New Year's Day - Observed (Federal Holiday observed on Monday, as New Year's Day falls on Sunday). (Jan. 2)

* Mon., Jan. 2, 4:00 a.m. EST / 9:00 UTC - Venus 1.9 degrees south of the Moon.

* Mon., Jan. 2, 11:00 p.m. EST / Jan. 3, 4:00 UTC - Neptune 0.4 degree south of the Moon; occultation: majority of Southeast Asia, Micronesia, Hawaii, West Coast of North America.

* Tue., Jan. 3, 2:00 a.m. EST / 7:00 UTC - Mars 0.2 degree south of the Moon; occultation: southern tip of India, majority of Southeast Asia, Micronesia.

* Tue., Jan. 3, 10:00 a.m. EST / 15:00 UTC - (Best viewing: Midnight to Dawn) - Peak of Quadrantid Meteor Shower. (Jan. 3 to 4)

* Wed., Jan. 4, 9:00 a.m. EST / 14:00 UTC - Earth at perihelion (closest Earth approach to the Sun in New Year): 91,404,322.506562 miles / 147,100,998 kilometers. (Jan. 2 to 4)

* Wed., Jan. 4, 10:56 a.m. EST / 15:56 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

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

* Thur., Jan. 5, 2:47 p.m. EST / 19:47 UTC - Moon Phase: First Quarter.

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

* Fri., 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)

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

* Jan. 8 to 14 - Winter Driving Awareness Week.

* Sun., 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)

* Mon., Jan. 9 - National Clean Off Your Desk Day. (2nd Monday of January)

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

* Mon., Jan. 9, 10:00 a.m. EST / 15:00 UTC - Star Aldebaran 0.4 degree south of the Moon; occultation: northeastern portion of Africa, Middle East, India, China, Japan.

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

* Tue., Jan. 10, 1:00 a.m. EST / 6:00 UTC - Moon at perigee: 225,705.6291 miles / 363,238 kilometers.

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

* Wed., Jan. 11, 1:58 p.m. EST / 18:58 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* Thur., Jan. 12, 6:34 a.m. EST / 11:34 UTC - Moon Phase: Full Moon (Wolf Moon).

* Thur., Jan. 12, 8:00 p.m. EST / Jan. 13, 1:00 UTC - Venus 0.4 degree north of Neptune.

* Fri., Jan. 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)

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

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

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

* Sun., Jan. 15 (2001) - Anniversary of launch of Wikipedia, free-of-charge, on-line encyclopedia. (Jan. 15)

* Sun., Jan. 15, 12:00 Midnight EST / 5:00 UTC - Star Regulus 0.8 degree north of the Moon; occultation: southern half of South America, Antarctic Peninsula.

* Mon., Jan. 16 - 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)

* Tue., 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)

* Tue., Jan. 17, 8:00 p.m. EST / Jan. 18, 1:00 UTC - Asteroid Vesta at opposition (Vesta visible approx. local sunset to local sunrise).

* Jan. 19 to 28 - 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.

* Thur., Jan. 19, 12:00 Midnight EST / 5:00 UTC - Jupiter 3 degrees south of the Moon.

* Thur., Jan. 19, 5:13 p.m. EST / 22:13 UTC - Moon Phase: Last Quarter.

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

* Sat., Jan. 21, 7:00 p.m. EST / Jan. 22, 0:00 UTC - Moon at apogee: 251,601.8949 miles / 404,914 kilometers.

* Jan. 23 to 29 - National Drug & Alcohol Facts Week. (4th week of January)

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

* Tue., Jan. 24, 5:00 a.m. EST / 10:00 UTC - Saturn 4 degrees south of the Moon.

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

* Wed., Jan. 25, 8:00 p.m. EST / Jan. 26, 1:00 UTC - Mercury 4 degrees south of the Moon.

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

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

* Fri., Jan. 27 (1967) - 50th Anniversary of Apollo 1 fire; three astronauts perished: Gus Grissom, Ed White, Roger Chaffee. (Jan. 27)

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

* Fri., Jan. 27, 7:07 p.m. EST / Jan. 28, 0:07 UTC - Moon Phase: New Moon - Lunation # 1164.

* Sat., Jan. 28 (1986) - Anniversary of STS Space Shuttle Challenger explosion; 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).

* Sat., Jan. 28 - Chinese New Year, based on a lunisolar calendar of which dates indicate both the moon phase and the time of the solar year. This marks the beginning of the Chinese Year of the Rooster.

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

* Jan. 29 to Feb. 4 - National Catholic Schools Week. (End of January / Beginning of February)

* Sun., Jan. 29 - Earned Income Tax Credit (EITC) Awareness Day. (Jan. 29)

* Mon., Jan. 30 - National Bubble-Wrap Appreciation Day, first used by IBM to safely ship computers in 1961. (Last Monday of January)

* Mon., Jan. 30, 6:00 a.m. EST / 11:00 UTC - Neptune 0.2 degree south of the Moon; occultation: South Atlantic Ocean including Ascension Island, central portion of Africa, Saudi Arabia, India, western portion of China.

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

* Tue., Jan. 31, 10:00 a.m. EST / 15:00 UTC - Venus 4 degrees north of the Moon.

* Tue., Jan. 31, 8:00 p.m. EST / Feb. 1, 1:00 UTC - Mars 2 degrees north of the Moon.

Astronomical Calendar: 2017 February
Monthly Observances This Month

Eclipses in 2017 February ---
Penumbral Lunar Eclipse: Feb. 10 to 11
Annular Solar Eclipse: Feb. 26

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


* Nov. 1 to April 30 - Use of life jackets by every person on a small boat (less than 16 feet in length), during cold-weather months, is mandatory. (Nov. 1 to April 30)

* Jan. 29 to Feb. 4 - National Catholic Schools Week. (End of January / Beginning of February)

* Tue., Jan. 31, 8:00 p.m. EST / Feb. 1, 1:00 UTC - Mars 2 degrees north of the Moon.

* Wed., 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)

* Wed., 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)

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

* Wed., Feb. 1, 8:08 a.m. EST / 13:08 UTC - Jupiter near bright Star Spica.

* Thur., 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: 7:25 a.m. EST / 12:25 UTC) .
Actual Cross-Quarter Day.

* Thur., Feb. 2, 6:31 a.m. EST / 11:31 UTC - Mars near Venus.

* Thur., Feb. 2, 9:00 p.m. EST / Feb. 3, 2:00 UTC - Asteroid & Dwarf Planet Ceres 1.0 degree south of the Moon; occultation: Alaska, northern Canada, Greenland, eastern portion of Siberia in Russia.

* Fri., 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)

* Fri., Feb. 3 - National Wear Red Day - Go Red for Women movement to heart disease in women (American Heart Association). (First Friday in Feb.)

* Fri., Feb. 3, 5:36 p.m. EST / 22:36 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. 3, 11:19 p.m. EST / Feb. 4, 4:19 UTC - Moon Phase: First Quarter.

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

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

* Sat., 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)

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

* Sun., Feb. 5, 5:00 p.m. EST / 22:00 UTC - Star Aldebaran 0.2 degree south of the Moon; occultation: Central America, northern portion of South America, Caribbean Sea, southern portion of Europe, northern portion of Africa, western portion of the Middle East.

* Mon., Feb. 6, 9:00 a.m. EST / 14:00 UTC - Moon at perigee: 229,171.6376 miles / 368,816 kilometers.

* Tue., Feb. 7 - African American Coaches Day about the benefits of working with a personal or business coach. (First Tuesday in February)

* Tue., Feb. 7 - Mercury at aphelion.

* Wed., Feb. 8 (1910) - Anniversary of founding of the Boy Scouts of America. (Feb. 8)

* Thur., Feb. 9, 5:59 p.m. EST / 22:59 UTC - Praesepe (M44): The Beehive Cluster near the nearly-Full Moon.

* Fri., Feb. 10, 7:33 p.m. EST / Feb. 11, 0:33 UTC - Moon Phase: Full Moon (Snow Moon).

* Fri., Feb. 10, 7:43:52.9 p.m. EST / Feb. 11, 0:43:52.9 UTC - Time of greatest eclipse for Penumbral Lunar Eclipse, dimly visible through most of the world except extreme western Alaska, extreme eastern Asia, Australia, New Zealand and most of the Pacific Ocean.

* Sat., 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)
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

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

* Sat., Feb. 11, 9:00 a.m. EST / 14:00 UTC - Star Regulus 0.8 degree north of the Moon; occultation: Australia, New Zealand, Wilkes Land section of Antarctica.

* Sun., Feb. 12 (1809) - Anniversary of birth of 16th American President, Abraham Lincoln. (Feb. 12)
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Sun., Feb. 12 (1809) - Anniversary of birth of English naturalist, Charles Darwin; Darwin Day. (Feb. 12)

* Sun., Feb. 12 - Autism Sunday / International Day of Prayer for Autism and Asperger Syndrome. (Second Sunday of February)

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

* Mon., Feb. 13 - National Clean Out Your Computer Day. (Second Monday in February)

* Mon., Feb. 13 - 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)

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

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

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

* Tue., 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)

* Tue., Feb. 14 - National Organ Donor Day. (Feb. 14)

* Wed., Feb. 15 (1564) - Anniversary of the birth of Italian Astronomer Galileo Galilei. (Feb. 15)

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

* Wed., Feb. 15, 10:00 a.m. EST / 15:00 UTC - Jupiter 3 degrees south of the Moon.

* Thur., Feb. 16 - World Read Aloud Day.

* Fri. through Mon., Feb. 17, 18, 19, 20 - CITIZEN SCIENCE: The Great Backyard Bird Count. (Presidents' Day holiday weekend, starting on Friday)

* Fri., Feb. 17 - Random Acts Of Kindness Day. (Feb. 17)

* Fri., Feb. 17, 3:02 a.m. EST / 8:02 UTC - Jupiter at aphelion.

* Fri., Feb. 17, 2:00 a.m. EST / 7:00 UTC - Venus brightest for the first half of 2017: Visual Magnitude -4.8.

* Feb. 18 to 27, 8:00 to 10:00 p.m. Prevailing Local Time - CITIZEN SCIENCE: 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.

* Sat., 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. 18, 2:33 p.m. EST / 19:33 UTC - Moon Phase: Last Quarter.

* Sat., Feb. 18, 4:00 p.m. EST / 21:00 UTC - Moon at apogee: 251,267.5972 miles / 404,376 kilometers.

* Feb. 19 to 25 - National Engineers Week. (Third or fourth week in February, which includes George Washington's actual birthday of February 22)

* Sun., Feb. 19 (1473) - Anniversary of the 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.

* Feb. 20 to 24 - Fair Use / Fair Dealing Week, commissioned by the Association of Research Libraries. (Last full business week of February)

* Mon., Feb. 20 (1491) - Anniversary of the "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.

* Mon., Feb. 20 - Washington's Birthday Observed / Presidents' Day. (USA Federal Holiday: Third Monday in Feb.)
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. 20 - Venus at perihelion.

* Mon., Feb. 20, 6:53 p.m. EST / 23:53 UTC - Saturn 4 degrees south of the Moon.

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

* Wed., Feb. 22 (1732) - Anniversary of 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)
See also: Washington's Birthday Observed / Presidents' Day * Washington's Birthday Actual (Julian Calendar) * Washington's Birthday Actual (Gregorian Calendar) * Lincoln's Birthday.

* Wed., Feb. 22, 2:56 p.m. EST / 19:56 UTC - Dwarf Planet Pluto very close to the Moon (visible with difficulty, when using a telescope).

* Thur., Feb. 23 - Introduce a Girl to Engineering Day. (Thursday of National Engineering Week)

* Thur., Feb. 23 - Digital Learning Day.

* Feb. 24, 25, 26 - National Girl Scout Cookie Weekend. (Last weekend of February / first weekend of March)

* Fri., Feb. 24 (1914) - Anniversary of the concept of the Projection Planetarium. (Feb. 24)

* Sat., 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)

* Feb. 26 to March 4 - Montessori Education Week. (Last week of February / first week of March)

* Sun., Feb. 26, 9:53:24.3 a.m. EST / 14:53:24.3 UTC - Time of greatest eclipse for Annular Solar Eclipse visible in a narrow path from the South Pacific Ocean through Chile, Argentina, South Atlantic Ocean, Angola, Zambia, and the Democratic Republic of the Congo. A Partial Solar Eclipse will be visible over a wider area of the eastern portion of the South Pacific Ocean, southern two-thirds of South America, South Atlantic Ocean, southern two-thirds of Africa, and a small portion of Antarctica.
NEVER look directly at a Solar Eclipse or Eclipse of the Sun unless you have the training and proper equipment to do so safely.
SAFE WAY TO VIEW SOLAR ECLIPSE OR ECLIPSE OF THE SUN

* Sun., Feb. 26, 9:58 a.m. EST / 14:58 UTC - Moon Phase: New Moon - Lunation # 1165.

* Feb. 27 to March 4 - America Saves Week. (Last week of Feb.)

* Feb. 27 to March 4 - Military Saves Week.

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

* Mon., Feb. 27, 3:00 a.m. EST / 8:00 UTC - Mars 0.6 degree north of Uranus.

* Mon., Feb. 27, 4:44 p.m. EST / 21:44 UTC - Mercury at farthest point from the Earth.

* Tue., Feb. 28 - World Spay Day. (Last Tuesday of every February)

* Tue., Feb. 28 - Shrove Tuesday / Fat Tuesday. (Day before Ash Wednesday)

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

* Wed., 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 first recorded lunar eclipse in continental North America.

Astronomical Calendar: 2017 March
Monthly Observances This Month

"March roars in like a lion and goes out like a lamb."
(Origin: Constellations Leo the Lion & Aries the Ram)

Daylight Saving Time Begins March 12

Spring Begins: ~ March 19, 20, 21

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


* Nov. 1 to April 30 - Use of life jackets by every person on a small boat (less than 16 feet in length), during cold-weather months, is mandatory. (Nov. 1 to April 30)

* Feb. 26 to March 4 - Montessori Education Week. (Last week of February / first week of March)

* Feb. 27 to March 4 - America Saves Week. (Last week of Feb.)

* Feb. 27 to March 4 - Military Saves Week.

* Wed. 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 first recorded lunar eclipse in continental North America.

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

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

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

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

* Wed., March 1 - Ash Wednesday, the beginning of Lent. (First Wednesday in Lent, 46 days before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Wed., March 1, 2:00 p.m. EST / 19:00 UTC - Mars 4 degrees north of the Moon (closest approach: 4:21 p.m. EST / 21:21 UTC).

* Wed., March 1, 10:00 p.m. EST / March 2, 3:00 UTC - Neptune in conjunction with the Sun (Neptune not visible, even with a telescope).

* Thur., 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)

* Thur., March 2, 4:00 p.m. EST / 21:00 UTC - Asteroid & Dwarf Planet Ceres 0.8 degree north of the Moon; occultation: southern half of South America, Antarctic Peninsula, British territory of South Georgia Island.

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

* Fri., March 3 - Employee Appreciation Day. (First Friday of March)

* Fri., March 3, 3:00 a.m. EST / 8:00 UTC - Moon at perigee: 229,324.4949 miles / 369,062 kilometers.

* Sat., 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)

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

* Sat., March 4, 10:00 p.m. EST / March 5, 3:00 UTC - Star Aldebaran 0.2 degree south of the Moon; occultation: Soloman Islands, Micronesia, Hawaii, North America, Central America, western portion of the Caribbean Sea.

* March 5 to 11 - Teen Tech Week.

* March 5 to 11 - National Consumer Protection Week. (First full week of March)

* March 5 to 12 - Sleep Awareness Week®. (Last day of week coincides, each year, with conversion to Daylight Saving Time)

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

* Sun., March 5, 6:32 a.m. EST / 11:32 UTC - Primary Moon Phase: First Quarter.

* Mon., March 6, 7:00 p.m. EST / March 7, 0:00 UTC - Mercury in superior conjunction with the Sun (Mercury not visible, even with a telescope).

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

* Thur., March 9, 1:24 a.m. EST / 6:24 UTC - Close approach: Moon and Praesepe / Beehive Open Star Cluster.

* Fri., 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) 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)

* Fri., 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)

* Fri., March 10, 6:00 p.m. EST / 23:00 UTC - Star Regulus 0.8 degree north of the Moon; occultation: southeastern portion of South America, British territory of South Georgia Island, Norwegian territory of Queen Maud Land on Antarctica, southern tip of South Africa.

* Sat., March 11, Sunset (Pittsburgh - Sunset: 6:23 p.m. EST / 23:23 UTC) - 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.

* March 12 to 18 - Wildfire Prevention Week. [Pennsylvania: Spring (Second week of March), Autumn]

* Sun., March 12 - Day of Planetaria. (Sunday in mid-March)

* Sun., March 12 (1912) - Anniversary of the founding of the Girl Scouts of the United States of America. (March 12)

* Sun., March 12 (1989) - Anniversary of the original proposal founding the World Wide Web on the Internet. (March 12)

* Sun., March 12, 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 12, 10:54 a.m. EDT / 14:54 UTC - Primary Moon Phase: Full Moon (Worm Moon).

* March 13 to 19 - Brain Awareness Week. (Second full week of March)

* Mon., March 13 (1781) - Anniversary of the Planet Uranus discovery announced by Sir Frederick William Herschel. (March 13)

* Mon., March 13 (1938), 8:00 a.m. Prevailing Time - Anniversary of beginning of the radio news program CBS World News Roundup, the longest-running, network news broadcast in America. (March 13)

* Tue., March 14 - Zodiacal Light visible, with difficulty, after evening twilight in the western sky of the Northern Hemisphere, for the next two weeks. (February, March)

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

* Tue., March 14, 4:00 p.m. EDT / 20:00 UTC - Jupiter 2 degrees south of the Moon (closest approach: 5:35 p.m. EDT / 21:35 UTC).

* Tue., March 14, 11:00 p.m. EDT / March 15, 3:00 UTC - Asteroid Pallas in conjunction with the Sun (Pallas not visible, even with a telescope).

* March 15 to April 16 - Annual National Cherry Blossom Festival, Washington DC. (~ Vernal Equinox to early April)

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

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

* Wed., 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)

* Thur., 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)

* Thur., 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)

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

* Sat., March 18, 1:00 p.m. EDT / 17:00 UTC - Moon at apogee: 251,437.853 miles / 404,650 kilometers.

* March 19 to 31 - Tsunami Preparedness Weeks.

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

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

* March 20 to 26 - Fix-a-Leak Week. (U.S. Environmental Protection Agency: March)

* March 20 to 29 - 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.

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

* Mon., March 20, 6:00 a.m. EDT / 10:00 UTC - Saturn 3 degrees south of the Moon.

* Mon., March 20, 6:29 a.m. EDT / 10:29 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)

* Mon., March 20, 11:58 a.m. EDT / 15:58 UTC - Primary Moon Phase: Last Quarter.

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

* Tue., March 21 (1617) - 400th Anniversary of the Funeral of Native American Pocahontas (a.k.a. Rebecca Rolfe) at age ~ 21. (March 21)

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

* Wed., March 22, 1:53 a.m. EDT / 5:53 UTC - Very close approach: Moon and Dwarf Planet Pluto.

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

* Thur., March 23 - Mercury at perihelion.

* Sat., 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)

* Sat., 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)

* Sat., March 25, 6:00 a.m. EDT / 10:00 UTC - Venus in inferior conjunction with the Sun (Venus not visible, even with a telescope).

* Sat., March 25, 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)

* March 26 to April 1 - National Week of the Ocean.

* Sun., March 26, 4:00 a.m. EDT / 8:00 UTC - Neptune 0.005 degree north of the Moon; occultation: British territory of Ascension Island, South Africa, northern portion of Madagascar, Yemen, Oman, southwestern portion of Asia.

* March 27 to 31 - Solar Week. (Mid-to-Late March, Mid-to-Late October)

* March 27 to 31 - Flood Safety Awareness Week. (Pennsylvania: March).

* March 27 to 31 - Open Education Week. (Last week of March)

* Mon., March 27, 2:00 a.m. EDT / 6:00 UTC - Mercury 2 degrees north of Uranus.

* Mon., March 27, 10:57 p.m. EDT / March 28, 2:57 UTC - Primary Moon Phase: New Moon - Lunation # 1166.

* Tue., March 28 - Diabetes Alert Day. (Fourth Tuesday of March)

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

* Wed., March 29, 12:56 a.m. EDT / 4:56 UTC - Close approach: Moon and Uranus.

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

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

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

* Thur., March 30, 9:00 a.m. EDT / 13:00 UTC - Moon at perigee: 226,087.7724 miles / 363,853 kilometers.

* Thur., March 30, 11:33 a.m. EDT / 15:33 UTC - Close approach: Moon and Mars.

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

* Fri., 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)

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

Astronomical Calendar: 2017 April
Monthly Observances This Month

" April showers bring May flowers !"

Meteor Shower -
Lyrid: April 22

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


* Nov. 1 to April 30 - Use of life jackets by every person on a small boat (less than 16 feet in length), during cold-weather months, is mandatory. (Nov. 1 to April 30)

* March 15 to April 16 - Annual National Cherry Blossom Festival, Washington DC. (~ Vernal Equinox to mid-April)

* March 19 to April 30, September 24 through November 5 - Tsunami Preparedness Weeks. (mid-March through April, mid-September through early November)

* March 26 to April 1 - National Week of the Ocean.

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

* 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)

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

* Sat., 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)

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

* Sat., 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)

* Sat., April 1 - 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 1, 5:00 a.m. EDT / 9:00 UTC - Star Aldebaran 0.3 degree south of the Moon; occultation: northeastern section of Africa, Arabia, India, Mongolia, China, Japan.

* April 2 to 8 - National Crime Victims' Rights Week. (Early to mid-April)

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

* Sun., April 2 - Good Deeds Day. (Sunday in late March or early to mid-April)

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

* Sun., April 2, 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)
Some States to Abandon Daylight Saving Time ?
Science of Daylight Saving Time.

* April 3 to 7 - National Retirement Planning Week®. (Early to mid-April)

* April 3 to 7 - National Work Zone Awareness Week. (Early to mid-April)

* April 3 to 9 - National Public Health Week. (First week of April)

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

* Mon., April 3, 2:39 p.m. EDT / 18:39 UTC - Primary Moon Phase: First Quarter.

* Tue., April 4 - Equal Pay Day - This date symbolizes how far into the year women must work to earn what men earned in the previous year. (Early to mid-April)

* Wed., April 5 - Global Day of the Engineer. (Early April)

* Wed., April 5 - National Walking Day / Move More in April. (First Wednesday of April)

* Wed., April 5, 7:59 a.m. EDT / 11:59 UTC - Moon nears Beehive Open Cluster of stars.

* Thur., April 6 (1917) - Centennial Anniversary of United States entry into World War I. (April 6)

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

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

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

* Fri., April 7, 12:34 a.m. EDT / 4:34 UTC - Star Regulus 0.7 degree north of the Moon; occultation: South Polynesia, Antarctic Peninsula, southern tip of South America.

* Fri., April 7, 6:00 p.m. EDT / 22:00 UTC - Jupiter at opposition (Jupiter visible approx. local sunset to local sunrise).

* April 8 to 16 - National Robotics Week. (Early to mid-April)

* April 9 to 15 - National Library Week. (Second week of April)

* April 9 to 15 - Pan American Week. (Week of April 14, Pan American Day)

* April 9 to 17 - 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 9 - Palm Sunday. (Sunday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Sun., 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.

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

* Mon., 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.

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

* Mon., April 10, 5:00 p.m. EDT / 21:00 UTC - Jupiter 2 degrees south of the Moon.

* April 10, local sunset to April 18, local sunset (Sunset in Pittsburgh - April 10: 7:54 p.m. EDT / 23:54 UTC; April 18: 8:02 p.m. EDT / April 19, 0:02 UTC) - Jewish festival of Passover.

* Tue., April 11 - National Library Workers Day. (Tuesday of National Library Week)

* Tue., April 11, 2:08 a.m. EDT / 6:08 UTC - Primary Moon Phase: Full Moon. (Pink Moon)

* Wed., 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)

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

* Wed., 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.

* Wed., 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.

* Wed., April 12 - Holy Wednesday. (Wednesday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Wed., April 12 - National Bookmobile Day. (Wednesday of National Library Week)

* Thur., April 13 - Maundy Thursday / Holy Thursday. (Thursday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Thur., April 13 - Teen Literature Day. (Thursday of National Library Week)

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

* Thur., April 13 - FND International Awareness Day - Regarding Functional neurological symptom disorder (FNsD). (April 13)

* Thur., April 13 (1970), 10:07:53 p.m. EST / April 14, 3:07:53 UTC (Note: In 1970, Daylight Saving Time did not begin until April 26) - 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.

* Fri., April 14 - Good Friday. (Friday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

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

* Fri., 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?

* Fri., April 14 (1970), 7:21 p.m. EST / April 15, 0:21 UTC (Note: In 1970, Daylight Saving Time did not begin until April 26) - 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)

* Fri., April 14, 2:00 a.m. EDT / 6:00 UTC - Uranus in conjunction with the Sun (Uranus not visible, even with a telescope).

* April 15 to 23 - National Park Week. (Third week of April, including both weekends)

* Sat., April 15 - Holy Saturday. (Saturday before Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Sat., April 15, 6:00 a.m. EDT / 10:00 UTC - Moon at apogee: 251,950.4842 miles / 405,475 kilometers.

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

* April 16 to 22 - National Minority Cancer Awareness Week. (Third week of April)

* Sun., April 16 (Sunrise in Pittsburgh: 6:40 a.m. EDT / 10:40 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?

* Sun., April 16 (Sunrise in Pittsburgh: 6:40 a.m. EDT / 10:40 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 16 - National Healthcare Decisions Day. (April 16)

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

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

* Sun., April 16, 2:00 p.m. EDT / 18:00 UTC - Saturn 3 degrees south of the Moon.

* Mon., April 17 - Easter Monday. (Monday after Easter Sunday)
Will Christians Agree to Fix the Date of Easter?

* Mon., April 17 - Patriots' Day. (Third Monday of April)

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

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

* April 18 to 27, 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.

* Tue., April 18 - Tax Day (USA) - Individual Federal tax returns due or postmarked by end of day. (April 15, unless delayed by a holiday)

* Tue., April 18, 10:18 a.m. EDT / 14:18 UTC - Very close approach of Moon to Pluto.

* Wed., April 19, 5:57 a.m. EDT / 9:57 UTC - Primary Moon Phase: Last Quarter.

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

* Thur., April 20, 2:00 a.m. EDT / 6:00 UTC - Mercury at inferior conjunction with the Sun (Mercury not visible, even with a telescope).

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

* April 22 to 28 - International Dark-Sky Week. (Week of the New Moon in April)

* April 22 to 29 - National Infant Immunization Week (NIIW). (Mid-to-late April)

* April 22 to 29 - Money Smart Week®. (Last week of April)

* Sat., April 22 - Earth Day. (April 22)

* Sat., April 22 - March for Science including marches in Washington and Pittsburgh.

* Sat., April 22 - National Junior Ranger Day. (Saturday in National Park Week)

Sat., April 22 - Record Store Day. (Second or third Saturday in April)

* Sat., April 22, 8:00 a.m. EDT / 12:00 UTC (Best viewing: Midnight to Dawn) - Peak of Lyrid Meteor Shower. (April 22)

* Sat., April 22, 3:55 p.m. EDT / 19:55 UTC - Neptune 0.2 degree north of the Moon; occultation: majority of the continent of Australia, New Zealand, southeastern portion of Melanesia, and a portion of Polynesia.

* April 23 to 29 - 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 23 to 29 - National Environmental Education Week. (EE Week - Week near Earth Day: April 22)

* April 23 to 29 - Preservation Week for library and archive materials. (Last week of April)

* April 23 to 29 - Sleep Awareness Week®.

* April 23 to 29 - National Volunteer Week. (April)

* April 23 to 29 - Administrative Professionals Week. (Last full week of April)

* April 23 to 29 - National Re-entry Week. (Last week of April)

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

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

* Sun., April 23, 5:01 p.m. EDT / 21:01 UTC - Venus 5 degrees north of the Moon.

* April 24 to 28 - The Week of the Young Child™. (April)

* April 24 to 28 - Severe Weather Awareness Week. (Pennsylvania: April)

* April 24 to 30 - International Astronomy Week. (Begins on the Monday preceding the Saturday designated as Astronomy Day)

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

* Mon., April 24, 12:00 Noon EDT / 16:00 UTC - Asteroid 2 Pallas 0.8 degree south of the Moon; occultation: majority of North America, Greenland, Iceland, Ireland.

* Tue., 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)

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

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

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

* Wed., April 26 - Administrative Professionals Day. (Wednesday of Administrative Professionals' Week, last full week of April)

* Wed., April 26, 8:16 a.m. EDT / 12:16 UTC - Primary Moon Phase: New Moon - Lunation # 1167.

* Thur., April 27 - National Take Our Daughters and Sons To Work Day. (Fourth Thursday of April)

* Thur., April 27, 12:07 p.m. EDT / 16:07 UTC - Moon at perigee: 223,275.4464 miles / 359,327 kilometers.

* 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)

* Fri., April 28 - Arbor Day - National Arbor Day Foundation. (Last Friday of April)

* Fri., April 28 - Teach Children to Save Day. (Last Friday of April)

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

* Fri., April 28, 2:00 p.m. EDT / 18:00 UTC - Star Aldebaran 0.5 degree south of the Moon; occultation: United States, eastern section of Canada, Cuba, southern tip of Greenland, Europe, North Africa.

* Saturday - April 29, Sept. 30 - 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

* Sat., April 29 - Save the Frogs Day. (Last Saturday in April)
Also see news article.

* Sat., April 29, 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 29, 12:00 Midnight EDT / April 30, 4:00 UTC - Venus brightest for 2017 - Visual Magnitude: -4.7.

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

* Mon., 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.

* Fri., May 5, 3:26 p.m. EDT / 19:26 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.

Astronomical Calendar: 2017 May
Monthly Observances This Month

" April showers bring May flowers !"

Meteor Shower -
n-Aquarid (Eta Aquarid): May 4 to 7

Moon Phases:
Today *** Calendar Month
Next 27.32166 Days
(Orbital Period)

Planets, Stars, Sky Events:
Today *** This Week
Solar System *** Occultations
Constellations *** Star Chart
View ISS (Space Station)

2017 Equinoxes (EQX), Solstices (SOLC), and Cross-Quarter (XQ) Days
2017 Chronological Cycles and Eras
Dominical Letter: "A" - Used in a Perpetual Calendar. For Year of 2017.

Astronomical Glossary
of Terms Used

Astronomical Calendar
Archives

Other
Astronomical Calendars: Link 1 * Link 2

10,000-Year Calendar

Rise & Set Times

Current Sky Events & Astro Phenomena

News: Astronomy, Space, Science --

Weekly: SpaceWatchtower Blog

Daily: SpaceWatchtower Twitter Feed

History of Pittsburgh's Original
Buhl Planetarium and Institute of Popular Science

Astronomy Links

Science Links


a.m. = Ante-Meridiem (Morning: Midnight to a moment before Noon)

p.m. = Post-Meridiem (Afternoon & Evening: a moment after Noon to a moment before Midnight of the next day)

EST = Eastern Standard Time *** EDT = Eastern Daylight Saving Time *** UTC = Coordinated Universal Time


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

* April 30 to May 6 - National Small Business Week. (End of April, beginning of May)

* May 1 to 5 - NASA: Small Worlds Week. (First school-week of May)

* May 1 to 7 - Children's Book Week (First week of May, beginning on Monday; Moved from 2007 Nov. 12 to 18).

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

* Mon., 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.

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

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

* Tue., May 2 - World Asthma Day. (First Tuesday in May)

* Tue., May 2 - Give Local America Day to raise money for local non-profit organizations. (First Tuesday of May)

* Tue., May 2, 10:47 p.m. EDT / May 3, 2:47 UTC - Primary Moon Phase: First Quarter.

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

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

* Wed., May 3 - Bike to School Day. (First Wed. in May)

* Thur., May 4 - The Martian New Year (the time of the Vernal Equinox in the Northern Hemisphere of Mars, beginning Mars Year 34) begins on May 4. NASA and the Jet Propulsion Laboratory are co-sponsoring a STEAM celebration in the Mars business district--that is, Mars, Pennsylvania (about 25 miles / 40 kilometers north of Pittsburgh). The New Year on Mars occurs every 686.98 Earth days; the next Martian New Years will occur on 2019 March 23 and 2021 February 7. (Once every 686.98 days): Link 1 *** Link 2

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

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

* Thur., May 4, 6:00 a.m. EDT / 10:00 UTC - Star Regulus 0.5 degree north of the Moon; occultation: Indonesia, Malaysia, southern portion of New Guinea, Australia, New Zealand.

* Thur., May 4, 9:00 p.m. EDT / May 5, 1:00 UTC (Best viewing: Midnight to Dawn) - Peak of n-Aquarid (Eta Aquarid) Meteor Shower - remnants from Halley's Comet. (May 4 to 7)

* Fri., May 5 - Space Day. (First Friday in May)

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

* Fri., May 5, 3:26 p.m. EDT / 19:26 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).

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

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

* Sat., May 6 - National Scrapbooking Day. (First Saturday in May)

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

* Sat., May 6 - National Comic Book Day. (First Saturday in May)

* Sat., May 6 - National Wildfire Community Preparedness Day. (First Saturday in May)

* Sat., May 6, 9:37 a.m. EDT / 13:37 UTC - Mercury at aphelion.

* May 7 to 13 - Arson Awareness Week. (First full week of May)

* May 7 to 13 - Hurricane Preparedness Week. (Mid-May)

* May 7 to 13 - National Travel and Tourism Week. (First full week of May)

* May 7 to 13 - Bicycle Week / Bike-to-Work Week. (Second week of May)

* May 7 to 13 - National Hospital Week: Link 1 *** Link 2. (Second week of May)

* May 7 to 13 - Public Service Recognition Week (PSRW). (First full week of May)

* Sun., May 7 - World Password Day. (May 7)

* Sun., May 7, 5:00 p.m. EDT / 21:00 UTC - Jupiter 2 degrees south of the Moon.

* Sun., May 7, 7:00 p.m. EDT / 23:00 UTC - Mercury 2 degrees south of the Uranus.

* May 8 to 12 - National PTA Teacher Appreciation Week. (First full school-week of May)

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

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

* Tue., May 9 - National Teacher Day. (Tuesday of Teacher Appreciation Week)

* Wed., May 10 - National School Nurse Day. (Wednesday Of National Nurses Week)

* Wed., May 10 - National Student Nurses Day. (Wednesday Of National Nurses Week - originally May 8)

* Wed., May 10, 5:42 p.m. EDT / 21:42 UTC - Primary Moon Phase: Full Moon (Flower Moon).

* Thur., May 11, 9:59 p.m. EDT / May 12, 1:59 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

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

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

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

* Fri., May 12, 4;00 p.m. EDT / 20:00 UTC - Moon at apogee: 252,407.192 miles / 406,210 kilometers.

* May 13 to 21 - Armed Forces Week. (USA: Second Saturday to Sunday of following week in May)

* Sat., 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)

* Sat., May 13 - 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)

* Sat., May 13 - International Migratory Bird Day. (Second Saturday in May)

* Sat., May 13 - Stamp-Out Hunger Food Drive. (Second Saturday of May)

* Sat., May 13 - World Fair Trade Day. (Second Saturday of May)

* Sat., May 13, 7:00 p.m. EDT / 23:00 UTC - Saturn 3 degrees south of the Moon.

* May 14 to 20 - Food Allergy Awareness Week (FAAW).

* May 14 to 20 - Women's Health Week. (Week that begins on Mothers' Day)

* May 14 to 20 - National Police Week. [Week including National Peace Officers' Memorial Day (May 15)]

* Sun., May 14 - Mothers' Day. (Second Sunday in May)

* May 15 to 19 - National Transportation Week / National Defense Transportation Week. [Week in which National Defense Transportation Day falls (Friday)]

* May 15 to 22 - Infrastructure Week. (MId-May)

* Mon., May 15 - Women's Checkup Day. (Monday after Mothers' Day - Monday of Women's Health Week)

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

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

* Mon., May 15, 10:56 a.m. EDT / 14:56 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* Mon., May 15, 4:43 p.m. EDT / 20:43 UTC - Moon approaches close to Dwarf Planet Pluto.

* Tue., May 16, 7:00 a.m. to 8:00 p.m. EDT / 11:00 UTC to May 21, 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).

* May 17 to 26, 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.

* Wed., May 17 - Emergency Medical Services for Children (EMSC) Day. [Wednesday of Emergency Medical Services (EMS) Week]

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

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

* Thur., May 18, 8:33 p.m. EDT / May 19, 0:33 UTC - Primary Moon Phase: Last Quarter.

* Thur., May 18, 11:54 p.m. EDT / May 19, 3:54 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* Fri., 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)

* Fri., May 19 - National Defense Transportation Day. (Third Friday in May - Friday of National Defense Transportation Week)

* Fri., May. 19 - Wear Your Life-Jacket to Work Day. (Friday before the beginning of Safe Boating Week)

* Fri., May 19 - Bike-to-Work Day. (Third Friday in May)

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

* May 20 to 26 - National Safe Boating Week marks the beginning of the Recreational Boating Season. (First full week before Memorial Day Weekend)

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

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

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

* Sat., May 20 - Armed Forces Day. (USA: Third Saturday in May)

* Sat., May 20, 2:00 a.m. EDT / 6:00 UTC - Neptune 0.5 degree north of the Moon; occultation: Falkland Islands in Atlantic Ocean off of Argentina, southern portion of Africa, Madagascar, Republic of Maldives in the Indian Ocean.

* May 21 to 27 - Emergency Medical Services (EMS) Week. (Third full week of May)

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

* Sun., 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)

* Mon., 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.

* Mon., May 22 - Victoria Day - In Canada, informally considered the beginning of the Summer season. (Last Monday before May 25)

* Mon., May 22, 9:00 a.m. EDT / 13:00 UTC - Venus 2 degrees north of the Moon.

* Mon., May 22, 12:50 p.m. EDT / 16:50 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

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

* Tue., May 23, 9:00 p.m. EDT / May 24, 1:00 UTC - Mercury 1.6 degrees north of the Moon.

* Thur., May 25 (1961) - Anniversary of 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)

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

* Thur., May 25 - Christian Feast of the Ascension. (Thursday: 40th day of Easter)

* Thur., May 25, 3:44 p.m. EDT / 19:44 UTC - Primary Moon Phase: New Moon - Lunation # 1168.

* Thur., May 25, 9:00 p.m. EDT / May 26, 1:00 UTC - Moon at perigee: 221,958.1395 miles / 357,207 kilometers.
Very High Tides Along Ocean Coast-Lines Predicted.

* Thur., May 25, 9:00 p.m. EDT / May 26, 1:00 UTC - NBC-TV - Red Nose Day / Comedy Day. (Last Thursday in May)

* May 26, Sunset to June 25, Sunset (In Pittsburgh - May 26 Sunset: 8:40 p.m. EDT / May 27, 0:40 UTC; June 25 Sunset: 8:54 p.m. EDT / June 26, 0:54 UTC) - 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.

* Fri., May 26 - Don't Fry Day - The National Council on Skin Cancer Prevention Encourages Sun Safety Awareness. (Friday before Memorial Day).

* Fri., May 26, 1:47 a.m. EDT / 5:47 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* Fri., May 26, 10:42 p.m. EDT / May 27, 2:42 UTC - Moon approaches close to Mars.

* Sat., May 27, 8:16 p.m. EDT / May 28, 0:16 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* May 28 to June 3 - National Tire Safety Week.

* Mon., May 29 - Memorial Day. (USA: Last Monday in May)
Originally observed as Decoration Day. (USA: May 30)

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

* Mon., May 29, 2:45 p.m. EDT / 18:45 UTC - Double-shadow (shadows of 2 Galilean Moons) transit on Jupiter; visible, with difficulty, through telescope after sunset or before sunrise.

* Mon., May 29, 9:14 p.m. EDT / May 30, 1:14 UTC - Moon approaches close to the Beehive Open Star Cluster (M44).

* May 30, Sunset to June 1, Sunset (In Pittsburgh - May 30 Sunset: 8:43 p.m. EDT / May 31, 0:43 UTC; June 1 Sunset: 8:44 p.m. EDT / June 2, 0:44 UTC) - Observance of Shavuot in the Hebrew religion. The observance begins and ends at Sunset.

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

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

* Wed., May 31 - National Senior Health & Fitness Day. (Last Wednesday in May)

* Wed., May 31, 1:00 p.m. EDT / 17:00 UTC - Star Regulus 0.3 degree north of the Moon; occultation: eastern portion of Brazil, Cape Verde Islands, central and southern portions of Africa except southern tip of continent, Mauritius.

Return to History of The Buhl Planetarium and Institute of Popular Science, Pittsburgh

Astronomical Calendar - A.D. 2017

Authored By Glenn A. Walsh *** Sponsored By Friends of the Zeiss
Electronic Mail: < astrocalendar@planetarium.cc > *** Internet Web Cover Page: < http://www.planetarium.cc >
This Internet Web Page: < http://buhlplanetarium4.tripod.com/astrocalendar/2017.html >
SpaceWatchtower Blog
2017 January

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Other Internet Web Sites of Interest

History of The Buhl Planetarium and Institute of Popular Science, Pittsburgh

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History of Andrew Carnegie and Carnegie Libraries

Historic Duquesne Incline cable-car railway, Pittsburgh

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