function timezoneToOffset(timezone, fallback) {
	// IE/Edge do not "understand" colon (`:`) in timezone
	timezone = timezone.replace(ALL_COLONS, "");
	var requestedTimezoneOffset =
		Date.parse("Jan 01, 1970 00:00:00 " + timezone) / 60000;
	return isNumberNaN(requestedTimezoneOffset)
		? fallback
		: requestedTimezoneOffset;
}
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.