September 11

September 11 is the 254th day of the year (255th in leap years) in the Gregorian calendar. 111 days remain until the end of the year.

Between the years AD 1900 and 2099, September 11 of the Gregorian calendar is the leap day of the Coptic and Ethiopian calendars. These leap days occur in the years immediately before leap years in the Julian and Gregorian calendars. In all common years of the Coptic and Ethiopian calendars, September 11 is New Year's Day.

Since 2001, the date has been widely known for the terrorist attacks that occurred in the United States and were named after it. The date is also lesser known for the date of a putch in Chile, that overthrew the democratically elected government of Salvador Allende and would lock Chile in a 17-year dictatorship, which left around 3000 people dead or missing.




Holidays and observances


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