It was a Thursday.
21st of November 1984 was a Wednesday.
November 21st, 1978 fell on a Tuesday.
Monday
Wednesday
Thursday
It was on a Monday.
November 21st, 1957 fell on a Thursday.
November 11, 1974 was a Monday.
November 26 1974 was a Tuesday.
November 13th 1974 was a Wednesday.
November 21, 1983 was a Monday.
November 21st 1999 was a Sunday.