Thursday.
Thursday
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
It was a Sunday.
July 1, 1980 fell on a Tuesday.
It was a Tuesday.
The day of the week that May 1, 1977 fell on was a Sunday.
May Day, May 1 2009, was on a Friday.
1 May 1970 was a Friday.