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January 25

Day 25 of 366 · ISO week 4 · Aquarius · Winter (Northern Hemisphere)

January 25 is the 25th day of the year in the Gregorian calendar; 341 days remain until the year's end. It falls in winter (northern hemisphere) and under the astrological sign of Aquarius.

Day of year
25
Days remaining
341
ISO week
4
Zodiac
Aquarius
Season
Winter
Sun declination
-19.3°

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

Solar declination through the year — the Sun's apparent latitude on Earth. January 25 ≈ -19.3°
+23° −23° -19.3°
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).

On January 25 the Sun's declination is approximately -19.3°. 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 25.

Position in the year

Position in the calendar year — day 25 of 366 (with 341 remaining)
JanFebMarAprMayJunJulAugSepOctNovDec Jan 25

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 (25)5^2 · composite (no)
Days remaining (341)11 × 31
Date code DDMMYYYY25012026 · no palindrome in next 200 years
Sun declination-19.26° (Cooper approximation)
Distance from solstice36 days

Cross-references

The 25th of every other month

Adjacent days

Days nearby

Themes: burns-nightfirst-winter-olympics

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