it was a Monday
September 15, 1969 was a Monday.
June 15, 1969 was a Sunday.
August 15 1969 was a Friday.
February 15, 1969 fell on a Saturday.
15 December 1958 was a Monday.
15 December 1997 was a Monday.
15 December 1935 was on a Sunday.
December 15 1993 was on a Wednesday.
15 December 1980 was a Monday.
December 15 2010 was a Wednesday.
December 15, 1977 was a Thursday.
December 15, 1936 was a Tuesday.