Try this, when you get to the reference that ultimately is where the needed date is written to the db have it add like this -
Current date/time changeyearsto 1970, changemonthsto 1, changedateto 1, changehoursto 0, changeminutesto 0, change secondsto 0, +(seconds): YOURUNIX STAMP.
Im sure you see where im going there but incase your not sure, we have made your time and date 01/01/1970 00:00:00. Then we have added the unix stamp to it as seconds. Because unix is seconds since that date your result should be a correctly configured date and time in the correct thing type.