1 January 1980 was a Tuesday.
1 March 1980 was a Saturday.
November 1, 1980 fell on a Saturday.
September 1, 1980 fell on a Monday.
Tuesday
Thursday
Thursday.
It was a Sunday.
1 January 1986 was a Wednesday.
1 January 1989 was a Sunday.
January 1 1974 was a Tuesday.
1 January 2006 was a Sunday.
1 January 1970 was a Thursday.