It was a Thursday.
28th April 1991 was a Sunday.
August 4 1991 was on a Sunday.
4-6-2001 was in the first week of April. The day was Friday, April 6th.
February 4, 1991 fell on a Monday.
4 April 1995 was a Tuesday.
4 April 1964 was a Saturday.
April 4, 1977 was on a Monday.
April 4 1975 was a Friday.
April 4, 1914 was a Saturday.
April 4, 1988 on a Monday.
April 4, 1951 was on a Sunday.
April 4 2010 was a Sunday.