It was a Friday.
October 21, 1981 was a Wednesday.
Monday
Tuesday
Saturday
In 2009, August 21 was a Friday.
December 21, 1981 fell on a Monday.
August 21 1972 was a Monday.
August 21 1971 was a Saturday.
21 August 1933 was a Monday.
August 21, 1950 was a Monday.
August 21, 1978 was a Monday.