September 21st is the 264th day of the year (265th in leap years) in the Gregorian calendar. There are 101 days remaining until the end of the year.
1823 – According to Joseph Smith Jr., he was first visited by the Angel Moroni, who would guide him to the golden plates that became the basis of the Book of Mormon.
1938 – The Great New England Hurricane made landfall on Long Island, New York, killing an estimated 682 people and injuring 1,754 others.
1943 – Second World War: The German Army began the Massacre of the Acqui Division on the Greek island of Cephalonia, executing 5,155 Italian soldiers by 26 September.
1965 – Portugal accepted a Rhodesian mission in Lisbon despite objections by Britain, which had required its colony to implement democratic majority rule as a condition of independence.
2013 – Unidentified gunmen began a three-day attack on the upmarket Westgate shopping mall in Nairobi, Kenya, resulting in the deaths of 67 people with at least another 175 wounded.
Stephen King turns 71
Bill Murray turns 68
Faith Hill turns 51
Liam Gallagher turns 46
Nicole Richie turns 37
Jason Derulo turns 29