DATE_CHECK_PLAUSIBILITY: ABAP FM to Check Whether Date is Valid

Some FM/BAPIs will not check whether date is valid or not and it will update whatever values you pass to it.

Then how can we check whether date is valid? Just use the function module
DATE_CHECK_PLAUSIBILITY to check the date is valid or not.

*&---------------------------------------------------------------------*
*& Data Declaration
*&---------------------------------------------------------------------*
DATA: g_date TYPE sy-datum.
*&---------------------------------------------------------------------*
*& Start Of Selection
*&---------------------------------------------------------------------*
START-OF-SELECTION.
  g_date = '99999999'.

*Check whether Date is valid
  CALL FUNCTION 'DATE_CHECK_PLAUSIBILITY'
    EXPORTING
      date                      = g_date
    EXCEPTIONS
      plausibility_check_failed = 1
      OTHERS                    = 2.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.

Output

*&---------------------------------------------------------------------*
*& Data Declaration
*&---------------------------------------------------------------------*
DATA: g_date TYPE sy-datum.
*&---------------------------------------------------------------------*
*& Start Of Selection
*&---------------------------------------------------------------------*
START-OF-SELECTION.
  g_date = 'abcd'.

*Check whether Date is valid
  CALL FUNCTION 'DATE_CHECK_PLAUSIBILITY'
    EXPORTING
      date                      = g_date
    EXCEPTIONS
      plausibility_check_failed = 1
      OTHERS                    = 2.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.

Output