getIanaTZFromMS (msTZName) {
		// Get hash entry
		const he = zoneTable[msTZName];
		// If found return iana name, else null
		return he ? he.iana[0] : null;
	}
Lookup iana tz from windows
@param {string} msTZName the timezone name to lookup
@returns {string|null} the iana name or null of none is found