September 11 is the 254th day of the year (255th in leap years) in the Gregorian calendar. There are 111 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Friday or Sunday (58 in 400 years each) than on Wednesday or Thursday (57), and slightly less likely to occur on a Monday or Saturday (56).
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 those which are 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.
1226 – The first instance of the Catholic practice of perpetual Eucharistic adoration formally began in Avignon, France.
1649 – Cromwellian conquest of Ireland: Oliver Cromwell’s New Model Army ended the Siege of Drogheda, took over the town and massacred its garrison.
1708 – Charles XII of Sweden stops his march to conquer Moscow outside Smolensk, marking the turning point in the Great Northern War. The army is defeated nine months later in the Battle of Poltava, and the Swedish Empire ceases to be a major power.
2001 – Two hijacked aircraft crash into the World Trade Center in New York City, while a third smashes into The Pentagon in Arlington County, Virginia, and a fourth into a field near Shanksville, Pennsylvania, in a series of coordinated suicide attacks by 19 members of al-Qaeda. A total of 2,996 people are killed.
2007 – Russia tests the largest conventional weapon ever, the Father of All Bombs.
Scarface Director Brian De Palma turns 77
Sideways Actress Virginia Madsen turns 56
American Idol Judge Harry Connick Jr. turns 49
Empire Star Taraji P. Henson turns 47
Rapper Ludacris turns 40