silverstripe-framework/core/model/fieldtypes/Datetime.php

<?php

if(!class_exists('Datetime')) {
	class Datetime extends Date {
		
		function setValue($value) {
			if($value) $this->value = date('Y-m-d H:i:s', strtotime($value));
			else $value = null;
		}
	
		function Nice() {
			return date('d/m/Y g:ia', strtotime($this->value));
		}
		function Nice24() {
			return date('d/m/Y H:i', strtotime($this->value));
		}
		function Date() {
			return date('d/m/Y', strtotime($this->value));
		}
		function Time() {
			return date('g:ia', strtotime($this->value));
		}
		function Time24() {
			return date('H:i', strtotime($this->value));
		}
	
		function URLDatetime() {
			return date('Y-m-d%20H:i:s', strtotime($this->value));
		}
		
		function requireField() {
			DB::requireField($this->tableName, $this->name, "datetime");
		}
	}
}
?>