It was a Sunday.
21 August 1945 was a Tuesday.
October 21, 1945 was a Sunday.
Friday
Wednesday
September 21, 1945 was a Friday.
21 January 1983 was a Friday.
21 January 1983 was a Friday.
21 January 1953 was a Wednesday.
21 January 2004 was a Wednesday.
21 January 1943 was a Thursday.
January 21, 1996 was a Sunday.
January 21, 2012 was a Saturday.