getCalendarWeekNumbering() {
			let oCalendarWeekNumbering = CalendarWeekNumbering.Default;

			try {
				oCalendarWeekNumbering = oWritableConfig.get({
					name: "sapUiCalendarWeekNumbering",
					type: CalendarWeekNumbering,
					defaultValue: CalendarWeekNumbering.Default,
					external: true
				});
			} catch  (err) {
				//nothing to do, return default;
			}
			return oCalendarWeekNumbering;
		}
Returns the calendar week numbering algorithm used to determine the first day of the week
and the first calendar week of the year, see {@link module:sap/base/i18n/date/CalendarWeekNumbering
CalendarWeekNumbering}.

@returns {module:sap/base/i18n/date/CalendarWeekNumbering} The calendar week numbering algorithm

@public
@since 1.120