function getModelFormatter() {
		if (!oModelFormatter) {
			oModelFormatter = DateFormat.getDateInstance({
				calendarType : CalendarType.Gregorian,
				pattern : 'yyyy-MM-dd',
				strictParsing : true,
				UTC : true
			});
		}
		return oModelFormatter;
	}
Returns a formatter that formats the date into yyyy-MM-dd. Creates it lazily.

@returns {sap.ui.core.format.DateFormat}
  the formatter