December 10th 1981 was a Thursday.
December 22 1981 was a Tuesday.
December 18, 1981 was a Friday.
December 31 1981 was a Thursday.
December 13, 1981 fell on a Sunday.
December 3, 1981 fell on a Thursday.
December 4, 1981 fell on a Friday.
December 21, 1981 fell on a Monday.
December 19th, 1981 fell on a Saturday.
It was a Wednesday.
Tuesday!
Wednesday
1964 was a leap year which started on a Wednesday, so Dec 10th was a Thursday.