It was a Wednesday.
August 15, 1991 fell on a Thursday.
15 Jan 1991 was a Tuesday.
December 15, 1991 was a Sunday.
Saturday
Friday
November 15th 1991 was a Friday.
The 15th of June 1991 was a Saturday.
June 15, 1991 fell on a Saturday.
May 15, 2009 was a Friday.
May 15, 2006 was a Monday.
May 15, 1993, was a Saturday.
May 15, 1995 was a Monday