i think it was a monday
23rd May 1963 was a Thursday.
23rd December 1942 was a Wednesday.
December 23rd, 1956 fell on a Sunday.
December 23rd, 1971 fell on a Thursday.
December 23rd, 1993 fell on a Thursday.
23rd December, 1947 fell on a Tuesday.
Sunday
Tuesday
December 23rd, 1974 was a Monday.
December
14 December 1963 was a Saturday.
27 December 1963 was a Friday.