Calendars were very different in these times so it would depend very much on where you were living. They certainly did not have the name we attribute to them today.
25 December 1999 was a Saturday.
25 December 1936 was a Friday.
25 December 1967 was a Monday.
December 25 1955 was a Sunday.
December 25 1997 was a Thursday.
December 25, 2010 was a Saturday.
25 December 1953 was a Friday.
25 December 2005 was a Sunday.
25 December 1994 was a Sunday.
December 25 1987 was on a Friday.
December 25 1947 was a Thursday.
December 25 1995 was on a Monday.