Function module for date and time conversion in SRGBTBREL table

Hi All ,

I have field UTCTIME in table SRGBTBREL .

in Selection screen i'm entering date and time depending on selection criteria it should display value in grid .

in table date and time is stored as 20,130,205,055,431 format .

can any one tell me how to convert date(YYYYMMDD) and time(HH:MM:SEC) from selection screen to above format mentioned in table .