It was a Sunday.
January 18th, 1981 was a Sunday.
January 23, 1981 was a Friday.
January 25 1981 was a Sunday.
January 8th, 1981 fell on a Thursday.
January 15, 1981 fell on a Thursday.
January 1, 1981 fell on a Thursday.
January 2, 1981 fell on a Friday.
February 18, 1981 was a Wednesday.
December 18, 1981 was a Friday.
November 18, 1981 fell on a Wednesday.
It was a Thursday