It was a Monday.
November 21st, 1957 fell on a Thursday.
21st January 2004 fall on a Wednesday.
Tuesday.
January 15th, 1957 was a Tuesday.
21st Jan was a thursday in 2010
January 21, 1987 fell on a Wednesday.
Day Month Year UK Calendar 01 April 1957 was a Monday Month Day year USA Calendar Jan 04 1957 was a Tuesday
This depends on the year. July 21st has occurred on every day of the week.
June 21st, 1957 fell on a Friday.
Jan 1 2000
March 21st
April 21st 1950 was a Friday.