function _handleMonthPickerPageChange(oEvent) {

		var oFocusedDate = new CalendarDate(this._getFocusedDate(), this.getPrimaryCalendarType());
		this._togglePrevNext(oFocusedDate);

	}
Gets the start date as CalendarDate (timezone agnostic)

E.g. if the date is Dec 21th 1981, the result date would be Dec 21th, 1981 00:00:00 GMT
@private
@returns {sap.ui.unified.calendar.CalendarDate} the date