ABAP Date Conversion - DD.MM.YYYY to YYYYMMDD - SAP Function Module

There are two function modules available in SAP but don't get confused. 1. CONVERSION_EXIT_PDATE_INPUT 2. CONVERSION_EXIT_SDATE_INPUT In SAP both function module shows to be doing the same thing but that's not the case. CONVERSION_EXIT_PDATE_INPUT This FM should be used where there is a need to validate Date of Birth. So this function module will no doubt convert the date from DD.MM.YYYY to YYYYMMDD, but only for past date. CONVERSION_EXIT_SDATE_INPUT This is the correct function module for date conversion from DD.MM.YYYY to YYYYMMDD. Syntax: DATA: lv_dd_mm_yyyy(10) type c, lv_yyyymmdd type sy-datum. CALL FUNCTION 'CONVERSION_EXIT_SDATE_INPUT' EXPORTING input = lv_dd_mm_yyyy IMPORTING output = lv_yyyymmdd.