It was on a Monday.
21st of November 1984 was a Wednesday.
November 21st, 1978 fell on a Tuesday.
Friday
Monday
Wednesday
Thursday
It was a Thursday.
August 21, 1994 was a Sunday.
November 21st, 1957 fell on a Thursday.
November 21, 1983 was a Monday.
November 21st 1999 was a Sunday.
November 21st 2002 was a Thursday.