It was a Sunday.
4 January 1958 was a Saturday.
March 4, 1958, was a Tuesday.
November 4, 1958 was a Tuesday.
April 4, 1958 fell on a Friday.
October 4th, 1958 was a Saturday.
Saturday
It seems to have been a Thursday.
4 May 1984 was a Friday and the end of the week of working.
May 4 1965 was on a Tuesday.
May 4 1999 was on a Tuesday.
May 4 2010 was a Tuesday.
May 4, 1985 was a Saturday.