Friday
Friday.
It was a Saturday.
September 21, 1972 was on a Thursday
September 21, 1961 was a Thursday.
September 21 2004 was a Tuesday.
June 21 1983 was a Tuesday.
21 January 1983 was a Friday.
21 January 1983 was a Friday.
April 21, 1983 fell on a Thursday.
May 21, 1983 fell on a Saturday.
October 21, 1983 fell on a Friday.