- detect the user timezone, or more precisely list all IANA time zone ids that are compatible with the running javascript engine
- limit data duplication by using the Moment.js version of the Olson tables
See http://dystroy.org/stackoverflow/timezonedetect.html
<script src="moment-with-langs.min.js"></script>
<script src="moment-timezone-with-data.min.js"></script>
<script src="tzdetect.js"></script>
<script>
var tzid = tzdetect.matches()[0]; // for example : "Europe/Paris"
</script>
http://stackoverflow.com/questions/19420582/detect-the-id-of-the-current-user-timezone-using-moment-js