Monday
December 12 can fall on any day of the week.
10 December 1973 was a Monday.
Thursday, December 27, 1973
December 7th 1973 was a Friday.
December 5, 1973 was a Wednesday.
6 December 1973 was a Thursday.
December 30, 1973 fell on a Sunday.
December 30th, 1973 fell on a Sunday.
Saturday
It was a Wednesday.
Friday
Sunday