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December 30

Day 365 of 366 · ISO week 1 · Capricorn · Winter (Northern Hemisphere)

December 30 is the 365th day of the year in the Gregorian calendar; 1 day remain until the year's end. It falls in winter (northern hemisphere) and under the astrological sign of Capricorn.

Day of year
365
Days remaining
1
ISO week
1
Zodiac
Capricorn
Season
Winter
Sun declination
-23.1°

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. December 30 ≈ -23.1°
+23° −23° -23.1°
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).

On December 30 the Sun's declination is approximately -23.1°. 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 December 30.

Position in the year

Position in the calendar year — day 365 of 366 (with 1 remaining)
JanFebMarAprMayJunJulAugSepOctNovDec Dec 30

Holidays & 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 (365)5 × 73 · composite (no)
Days remaining (1)1
Date code DDMMYYYY30122026 · next palindrome year: 2103
Sun declination-23.08° (Cooper approximation)
Distance from solstice10 days

Cross-references

The 30th of every other month

Adjacent days

Days nearby

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