A day is one seventh of a week.
February 3, 1947 fell on a Monday of that week.
monday
It was a Monday.
Tuesday
Friday.
Monday
Monday
December 3, 1947 was a Wednesday.
June 3, 1961 fell on a Saturday.
April 3, 1961 fell on a Monday.
September 3, 1961 fell on a Sunday.
May 3, 1961 fell on a Wednesday.
March 3, 1961 fell on a Friday.
Dec. 03, 1987 was on a Thursday.
December 3, 1947 was a Wednesday.
January 3rd, 1961 fell on a Tuesday.