if you want to split date and time ?
If so , you can use FM IB_CONVERT_FROM_TIMESTAMP.
It will directly convert time stamp to date format in CRM.
or you can use it vice-versa using FM IB_CONVERT_TO_TIMESTAMP.
if you want table which store date like YYYYMMDD .Check where used list on DATS data element .
Regards,
Deepz