Jon Robson, 05/11/2014 02:55:
FYI mobile do this too in the top of thr page in the last modified bar. It would be good to standardise our approach here. Maybe we could propose something for core?
Conversations on such timestamp issues have been going on since 2012 with no conclusion, AFAIK. In 2013 something started with jQuery devs, Krinkle would know about it. I've dumped something in https://www.mediawiki.org/wiki/JQuery.globalize
Nemo