SAP Basis, Functional and ABAP Programming Reference Books
Find the difference between two days in days, months and years
*
* Type in two date and find the difference between the two dates in
* days, months and years.
*
* Written by : SAP Basis, ABAP Programming and Other IMG Stuff
*              http://www.sap-img.com
*
REPORT ZDATEDIFF.

DATA: EDAYS   LIKE VTBBEWE-ATAGE,
      EMONTHS LIKE VTBBEWE-ATAGE,
      EYEARS  LIKE VTBBEWE-ATAGE.

PARAMETERS: FROMDATE LIKE VTBBEWE-DBERVON,
            TODATE   LIKE VTBBEWE-DBERBIS DEFAULT SY-DATUM.

call function 'FIMA_DAYS_AND_MONTHS_AND_YEARS'
  exporting
    i_date_from          = FROMDATE
    i_date_to            = TODATE
*   I_FLG_SEPARATE       = ' '
  IMPORTING
    E_DAYS               = EDAYS
    E_MONTHS             = EMONTHS
    E_YEARS              = EYEARS.

WRITE:/ 'Difference in Days   ', EDAYS.
WRITE:/ 'Difference in Months ', EMONTHS.
WRITE:/ 'Difference in Years  ', EYEARS.

INITIALIZATION.
FROMDATE = SY-DATUM - 60.