Converts dates to your local timezone
This script applies to StackExchange sites stackoverflow.com, stackexchange.com, superuser.com, etc. The timezone that the StackExchange sites use is UTC i.e. +0000 (source) So, this script converts the dates to your local timezone, in both:
2015-12-14 14:11:13Z, and in Dec 14 at 14:11.It also recalculates them whenever the page changes.
It uses the jsTimezoneDetect JavaScript script (for getting the local timezone),
and the Moment.js and Moment-Timezone JavaScript libraries (for converting the dates).
Also note: jsTimezoneDetect does not do geo-location, nor does it care very much about historical time zones.
e.g. it may get "Europe/Berlin" when the user is in fact in "Europe/Stockholm" (they are both identical in modern time).