It was a Saturday.
October 13th, 1980 fell on a Monday.
June 13th, 1980 fell on a Friday.
October 13th, 1980 fell on a Monday.
December 13th, 1965 fell on a Monday.
December 13th, 2011 fell on a Tuesday.
December 13th, 1963 fell on a Friday.
December 13th, 2000 fell on a Wednesday.
December 13th, 1958 fell on a Saturday.
13th December 1949 was a Tuesday.
December 13th, 1971 fell on a Monday.
Wednesday.
It was a Sunday