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September 10

Day 254 of 366 · ISO week 37 · Virgo · Summer (Northern Hemisphere)

September 10 is the 254th day of the year in the Gregorian calendar; 112 days remain until the year's end. It falls in summer (northern hemisphere) and under the astrological sign of Virgo.

Day of year
254
Days remaining
112
ISO week
37
Zodiac
Virgo
Season
Summer
Sun declination
+3.8°

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. September 10 ≈ +3.8°
+23° −23° +3.8°
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).

On September 10 the Sun's declination is approximately +3.8°. 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 September 10.

Position in the year

Position in the calendar year — day 254 of 366 (with 112 remaining)
JanFebMarAprMayJunJulAugSepOctNovDec Sep 10

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.

No events currently catalogued for this day. External references may have more.

Notable births

No births currently catalogued for this day. External references may have more.

Notable deaths

No deaths currently catalogued for this day. External references may have more.

Numerical & calendrical curiosities

Day-of-year (254)2 × 127 · composite (no)
Days remaining (112)2^4 × 7
Date code DDMMYYYY10092026 · no palindrome in next 200 years
Sun declination+3.82° (Cooper approximation)
Distance from solstice82 days

Cross-references

The 10th of every other month

Adjacent days

Days nearby

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