December 21, 1958 fell on a Sunday.
Saturday
December 12 can fall on any day of the week.
15 December 1958 was a Monday.
1 December 1958 was a Monday.
December 12 1958 was a Friday.
December 9th, 1958 was a Tuesday.
6 December 1958 was a Saturday.
December 26, 1958 was a Friday.
December 7th, 1958 fell on a Sunday.
December 7, 1958 fell on a Sunday.
December 29, 1958 fell on a Monday.
December 28, 1958 fell on a Sunday.