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April 21

Day 112 of 366 · ISO week 16 · Taurus · Spring (Northern Hemisphere)

April 21 is the 112th day of the year in the Gregorian calendar; 254 days remain until the year's end. It falls in spring (northern hemisphere) and under the astrological sign of Taurus.

Day of year
112
Days remaining
254
ISO week
16
Zodiac
Taurus
Season
Spring
Sun declination
+11.9°

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

Solar declination through the year — the Sun's apparent latitude on Earth. April 21 ≈ +11.9°
+23° −23° +11.9°
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).

On April 21 the Sun's declination is approximately +11.9°. At this latitude the Sun is north of the celestial equator, giving the Northern Hemisphere longer 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 April 21.

Position in the year

Position in the calendar year — day 112 of 366 (with 254 remaining)
JanFebMarAprMayJunJulAugSepOctNovDec Apr 21

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.

Notable births

Notable deaths

Numerical & calendrical curiosities

Day-of-year (112)2^4 × 7 · composite (no)
Days remaining (254)2 × 127
Date code DDMMYYYY21042026 · no palindrome in next 200 years
Sun declination+11.92° (Cooper approximation)
Distance from solstice60 days

Cross-references

The 21st of every other month

Adjacent days

Days nearby

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