It was a Sunday.
18 July 1950 was a Tuesday.
monday
Saturday
September 18th 1950 was a Monday.
18 June 1979 was a Monday.
June 18 1970 was a Thursday.
June 18, 1947 was a Wednesday.
June 18 1812 was a Friday.
June 18 2010 was Friday.
June 18, 1964 fell on a Thursday.
June 18, 1984 fell on a Monday.
June 18, 1966 fell on a Saturday.