Dec 4 1960 was a Sunday.
4 weeks of which includes 4 of every day of the week. It has four weeks and has four of each day of the week.
Thursday
Friday
It was a Thursday.
Friday
Wednesday
Tuesday
Thursday
Sunday.
January 4, 1960, was a Monday.
August 4, 1960 fell on a Thursday.
October 4, 1960 fell on a Tuesday.
March 4, 1960 fell on a Friday.
July 4, 1960 fell on a Monday.
4 Sep 1960 was a Sunday.
Sunday
December 4, 1951 fell on a Tuesday.