June 21 1989 was on a Wednesday.
21 December 1989 was a Thursday.
Friday
Tuesday
Tuesday
August 21st, 1989 fell on a Monday.
From a US perpetual calendar: September 21, 1989 was on Thursday.
May 21, 1914 was a Thursday.
May 21, 1949 was a Saturday.
May 21 1927 was a Saturday.
May 21, 1975, was a Wednesday.
May 21 2010 was a Friday.