September 11
September 11 is the 255th day of the year in the Gregorian calendar; 111 days remain until the year's end. It falls in summer (northern hemisphere) and under the astrological sign of Virgo.
External references
Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.
Astronomy
On September 11 the Sun's declination is approximately +3.4°. 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 11.
Position in the year
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 (255) | 3 × 5 × 17 · composite (no) |
|---|---|
| Days remaining (111) | 3 × 37 |
| Date code DDMMYYYY | 11092026 · no palindrome in next 200 years |
| Sun declination | +3.42° (Cooper approximation) |
| Distance from solstice | 83 days |