Day 21 of 366 · ISO week 3 · Aquarius · Winter (Northern Hemisphere)
January 21 is the 21st day of the year in the Gregorian calendar; 345 days remain until the year's end. It falls in winter (northern hemisphere) and under the astrological sign of Aquarius.
Day of year
21
Days remaining
345
ISO week
3
Zodiac
Aquarius
Season
Winter
Sun declination
-20.1°
External references
Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.
Solar declination through the year — the Sun's apparent latitude on Earth. January 21 ≈ -20.1°
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).
On January 21 the Sun's declination is approximately -20.1°. At this latitude the Sun is south of the celestial equator, giving the Northern Hemisphere shorter days than nights.
Position in the calendar year — day 21 of 366 (with 345 remaining)
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.
1793 — Louis XVI of France was guillotined in the Place de la Révolution in Paris. ↗(233 years ago)
1908 — New York City passed the Sullivan Ordinance, making it illegal for women to smoke in public; the mayor vetoed it two weeks later. ↗(118 years ago)
1954 — USS Nautilus, the first nuclear-powered submarine, was launched at Groton, Connecticut. ↗(72 years ago)
1976 — Concorde began commercial supersonic passenger service. ↗(50 years ago)
Notable births
1824 — Stonewall Jackson, Confederate general. ↗(202 years ago)
1956 — Geena Davis, American actress. ↗(70 years ago)
Notable deaths
1924 — Vladimir Lenin, Russian revolutionary and Soviet head of state. ↗(102 years ago)
1959 — Cecil B. DeMille, American filmmaker. ↗(67 years ago)