Sunday
6 Jan 1980 was a Sunday.
Friday
It was a Thursday.
November 6 1991 was a wednesday
May 6 1991 was a Monday.
June 6, 1991 fell on a Thursday.
December 6, 1991 fell on a Friday.
Saturday
It was a Thursday.
^ 6 Nov 1991 was a Wednesday
In Australia and all other countries, the 6th of January 1955 was a Thursday.
Jan. 6 2003