d := js.Global().Get("Date").New()
	offset := d.Call("getTimezoneOffset").Int() * -1
	z.offset = offset * 60
	// According to https://tc39.github.io/ecma262/#sec-timezoneestring,
	// the timezone name from (new Date()).toTimeString() is an implementation-dependent
	// result, and in Google Chrome, it gives the fully expanded name rather than
	// the abbreviation.
	// Hence, we construct the name from the offset.
	z.name = "UTC"
	if offset < 0 {