I assume you mean "How many days is it from the first Wednesday of August to the first Saturday in September?"
This interval is 31 full days every year.
The day numbers in the months coincide each year, eg. this year 2011 the first Wednesday is the 3rd of August, and the first Saturday is the 3rd of September.
If 29th August is a Saturday, then 1st September will be a Tuesday.
September 1st, 1965 was on a Wednesday.
The days of the week with silent letters are Wednesday (the first "d") and Saturday (the "a").
August 1 2009 was on a Saturday.
September, 1st, 1956, was a Saturday.
1st August 1953 was a Saturday.
August 1st, 1964 fell on a Saturday.
Saturday, September 22nd 2012 was the first day of fall.
Saturday
Wednesday 21st September, 1955.
The given date was a Saturday.
USA Today first debuted on Wednesday, September 15, 1982.