January 31 Day 31 of 366 · ISO week 5 · Aquarius · Winter (Northern Hemisphere)
January 31 is the 31st day of the year in the Gregorian calendar; 335 days remain until the year's end. It falls in winter (northern hemisphere) and under the astrological sign of Aquarius.
January 31
31st day of the year
January 2024 calendar — highlighted: the 31st
Mo Tu We Th Fr Sa Su
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Day of year 31 / 366 Days remaining 335 ISO week 5 Weekday in 2024 Wednesday Zodiac (Western) Aquarius Zodiac (sidereal) Aquarius Season (N. hemi.) Winter Sun declination -17.8° Birthstone Garnet Birth flower Carnation, Snowdrop
External references Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.
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Astronomy
Solar declination through the year — the Sun's apparent latitude on Earth. January 31 ≈ -17.8°
0°
+23°
−23°
-17.8°
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).
On January 31 the Sun's declination is approximately -17.8°. At this latitude the Sun is south of the celestial equator, giving the Northern Hemisphere shorter days than nights.
For specific rise/set times at your location, see the U.S. Naval Observatory , or the NASA APOD archive for any imagery published on a January 31.
Position in the year
Position in the calendar year — day 31 of 366 (with 335 remaining)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Jan 31
Holidays & observances No widely-observed holidays catalogued for this day in our base set. See the external almanacs above for region-specific observances.
Events A selection of widely-documented historical events that took place on this date. Years marked BCE follow standard astronomical convention.
1606 — Guy Fawkes, leader of the Gunpowder Plot, was executed by hanging in London. ↗ (420 years ago) 1865 — The U.S. House of Representatives passed the Thirteenth Amendment, abolishing slavery. ↗ (161 years ago) 1958 — Explorer 1, the first U.S. satellite, was launched, discovering the Van Allen radiation belts. ↗ (68 years ago) 1990 — The first McDonald's restaurant opened in Moscow. ↗ (36 years ago) 2020 — The United Kingdom formally withdrew from the European Union (Brexit took legal effect). ↗ (6 years ago) Notable births
1797 — Franz Schubert, Austrian composer. ↗ (229 years ago) 1919 — Jackie Robinson, first African-American Major League Baseball player in modern era. ↗ (107 years ago) 1981 — Justin Timberlake, American singer and actor. ↗ (45 years ago) Notable deaths
1956 — A. A. Milne, English author. ↗ (70 years ago) 1995 — George Abbott, American theatre director and producer. ↗ (31 years ago) Numerical & calendrical curiosities Day-of-year (31) 31 · prime Days remaining (335) 5 × 67 Date code DDMMYYYY 31012026 · no palindrome in next 200 years Sun declination -17.77° (Cooper approximation) Distance from solstice 42 days
Cross-references The 31st of every other month Adjacent days Days nearby Themes: 13th-amendment explorer-1 brexit
WikiDay — On this day. About this day. An editorial almanac of every calendar day of the year, drawing on public sources including Wikipedia , Encyclopædia Britannica , the U.S. Library of Congress: Today in History , the U.S. Naval Observatory , NASA Astronomy Picture of the Day , Time and Date , and Wikidata . Brief factual statements are presented for editorial reference under fair-use principles; deeper accounts and copyrighted media remain with their original publishers via the external links on each page. Unofficial educational resource.
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