MONTH() returns the month portion of a specified DateTime as a number.
Use MONTH() to isolate the month portion of a DateTime.
MONTH(D)
MONTH() returns a numeric value denoting the month portion of a DateTime.
If the DateTime is purely a time or is invalid/ blank, then MONTH() returns a zero value.
Valid dates are in the range January 2, 1900 to December 31, 9999.
Using a date of August 14, 2012:
MONTH(‘20120814‘) = 8