This isn't a calendar month but more of a complete monthly period beginning
with a Monday and ending with a Sunday.
If the calendar month ends on a Tuesday the period would continue to the end
of the week through Sunday. If the calendar month begins after a Monday the
period would begin with the preceding Monday. Also know as a broadcast month.

"Ron Rosenfeld" wrote:

On Thu, 6 Mar 2008 12:42:04 -0800, Bob wrote:

I interchanged the word period with month. For example the month of May 2008
would begin with April 28 and end the final Sunday would be June 1.

Now I am completely confused. I always thought that May began on May 1 and
ended on May 31; and that June and April were not in the month of May.

Your going to have to be more explicit about your calendar rules in order for
me to help you.
--ron