July starts on the 1st day of the month.
If you mean what day of the week did July begin, the 1st of July 2013 was a Monday.
20th of July 1934
23rd of July
July starts on a different day of the week every year. In 2012, it started on a Sunday.
july 28 is the day celebrated
27th july 2012
July 4, 1776
June 21st
July 27, 2012
July 1, 1867.
July 27 2012 is the official start