date_date_set Sets the date &reftitle.description; voiddate_date_set DateTimeobject intyear intmonth intday voidDateTime::setDate intyear intmonth intday &reftitle.parameters; object DateTime object. year Year of the date. month Month of the date. day Day of the date. &reftitle.returnvalues; Returns &null; on success or &false; on failure. &reftitle.seealso; date_isodate_set date_time_set