Adding/subtracting a month to/from a date in SAP ABAP can be done with the FM MONTH_PLUS_DETERMINE. Operations with months are not so frequent, but just as useful. For example, calculate the end date of a contract that expires in half a year. In order to subtract the desired number of months, we simply pass a negative number to the months parameter.

Function module MONTH_PLUS_DETERMINE example:

"for example, lv_datum_old = '20230814'.

  CALL FUNCTION 'MONTH_PLUS_DETERMINE'
    EXPORTING
      months  = '-1'
      olddate = lv_datum_old
    IMPORTING
      newdate = lv_datum.

" as a result lv_datum = '20230714'.

Main settings:

• months – number of months. (months=6)
• olddate – start date before action (olddate = 04/18/2022)
• newdate – result after action(newdate = 10/18/2022)

All function method MONTH_PLUS_DETERMINE signature with types:

In what task did you use this FM? Do you know an alternative to this Functional module? Write in the comments!