May 31 1967 was a Wednesday.
July 31 1967 was a Monday.
August 31 1967 was a Thursday.
31 December 1980 was a Wednesday.
31 December 1931 was a Thursday.
31 December 1993 was a Friday.
31 December 1965 was a Friday.
December 31 1999 was a Friday.
December 31 1945 was a Monday.
December 31, 1968 was a Tuesday.
December 31, 1869 was a Friday.
31 December 2001 was a Monday.