monday
18 July 1950 was a Tuesday.
Saturday
It was a Sunday.
18 December 1994 was a Sunday.
December 18 2010 was a Saturday.
December 18, 1981 was a Friday.
September 18th 1950 was a Monday.
December 18, 1955 fell on a Sunday.
December 18, 1969 was a Thursday.
December 18, 2003 fell on a Thursday.
December 18, 1945 fell on a Tuesday.
December 18, 1886 fell on a Saturday.