October 21st 1975 was a Tuesday.
The day of the week was a Saturday.
21 February 1975 was a Friday.
21 August 1975 was a Thursday.
May 21, 1975, was a Wednesday.
Friday
21 October 1950 was a Saturday.
21 October 1990 was a Sunday.
October 21, 1945 was a Sunday.
October 21 1861 was on a Monday.
October 21 1992 was a Wednesday
October 21, 1999 was a Thursday.
October 21 2010 was a Thursday.