Entry of month:

This field will accept only the numbers 1 thru 12.
If the field is preloaded with a month there are
    2 special characters which can be used:

    +  will cause the displayed month to be incremented by one
    -  will cause the displayed month to be decremented by one

If either of the above characters is entered, the field will be
    updated as specified and no further entries will be allowed.

For ease of use:  If any character is typed in the first position
                  of this field, the remainder of the field will
                  be blanked out. Single digit months thus require
                  only 1 keystroke.
                  If you desire to modify only the 2nd digit, use
                  the right-arrow key to step up to it.







