These properties are not available for the DB-version of TDBDateTimePicker.
You can access the Date/Time of the field directly.
DBDateTimePicker1.Field.AsDateTime
O, and since TDBDateTimePicker is a TCustomDateTimePicker you can also do this:
uses DateTimePicker;
TDateTimePicker(DBDateTimePicker1).Date
(but I would go for the field-property unless you have to do it this way)