MONTH « Date Time functions « Microsoft Office Excel 2007 Tutorial

15.8.1.MONTH(serial_number) converts a serial number to a month
15.8.2.Determining the Last Day of a Month
15.8.3.Returns the number of days in a month
15.8.4.Determining Whether a Year Is a Leap Year
15.8.5.Returns an integer between 1 and 4 that corresponds to the calendar quarter for the date