This is what I am trying to figure out -
I have a form that people complete for travel. All forms have projected due dates calculated based on the date of travel. Example, if you travel on 9/1/2015, you would need to have "x" form submitted 30 days before. So the due date for that would be 8/1/2015
Are you sure?
August has 31 days, so 30 days before September 1 is August 2.
Months have a number of days varying from 28 to 31 days. A March 1, 2015 date would need to be submitted before Jauary 30, 2015 because February only has 28 days in 2015 and one needs 2 days from January to have the 30 days before.