January 15
January 15 is the 15th day of the year in the Gregorian calendar; 351 days remain until the year's end. It falls in winter (northern hemisphere) and under the astrological sign of Capricorn.
Day of year
15
Days remaining
351
ISO week
3
Zodiac
Capricorn
Season
Winter
Sun declination
-21.3°
External references
Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.
Wikipedia: this day →Britannica: this day →LoC: Today in History →History.com: this day →On-This-Day.com →BBC: On This Day →NYT: this day →Time and Date →NASA APOD archive →U.S. Naval Observatory →Wolfram|Alpha →Wikidata →Google Books →JSTOR →Internet Archive →
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Astronomy
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).
On January 15 the Sun's declination is approximately -21.3°. 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 15.
Position in the year
Holidays & observances
- Wikipedia Day (informal — Wikipedia launched on this day in 2001)
Events
A selection of widely-documented historical events that took place on this date. Years marked BCE follow standard astronomical convention.
- 1559 — Elizabeth I was crowned Queen of England at Westminster Abbey. ↗(467 years ago)
- 1870 — A political cartoon by Thomas Nast first depicted the Democratic Party as a donkey. ↗(156 years ago)
- 1919 — The Boston Molasses Disaster: a tank of molasses burst, killing 21. ↗(107 years ago)
- 1943 — The Pentagon, the world's largest office building, was dedicated. ↗(83 years ago)
- 1967 — The first Super Bowl was played in Los Angeles; Green Bay defeated Kansas City 35–10. ↗(59 years ago)
- 2001 — Wikipedia, the free online encyclopedia, was launched. ↗(25 years ago)
- 2009 — US Airways Flight 1549 ditched in the Hudson River; all 155 aboard survived (the "Miracle on the Hudson"). ↗(17 years ago)
Notable births
Notable deaths
- 1919 — Rosa Luxemburg, Polish-German revolutionary socialist. ↗(107 years ago)
Numerical & calendrical curiosities
| Day-of-year (15) | 3 × 5 · composite (no) |
|---|---|
| Days remaining (351) | 3^3 × 13 |
| Date code DDMMYYYY | 15012026 · no palindrome in next 200 years |
| Sun declination | -21.26° (Cooper approximation) |
| Distance from solstice | 26 days |