DATE_TIME - Timestamp (internal class - not supported as interface)
A date/time field is considered as basic data type even though it seems structured like date and time. The size for the date time field will influence neither the storage size nor the presentation (to string conversion). Timestamps are always presented as
2002/09/14 23:59:59:99
Date and a time value can be accessed as structure members of the DATETIME structure.
DATETIME last_update;
last_update.date = Date();
last_update.time = Time();