It was a Saturday.
Wednesday
If you mean what day of the week did July begin, the 1st of July 2013 was a Monday.
It was the 1st of July. The day of the week was a Monday. So it was Monday the 1st of July 2013.
July 1st, 1863 fell on a Wednesday.
Wednesday.
Monday
Wednesday
1st July 1977 was a Friday.
July 1st 1988 was a Friday.
July 1st 1996 was a Monday.
July 1st, 1867, was a Monday.
1st July, 1976, was a Thursday.