Windows 10 UK English locale set as defaul and only locale. Has a 24hour clock.

The times displayed in duration tooltips are in not localized correctly. they display as "Dec 14 08:23 am UTC"

(<time datetime="2017-12-14T09:39:06.804Z" title="Dec 14 9:39am UTC">3 minutes ago</time>)

The legacy Jenkins UK shows them in a good format "14-Dec-2017 09:39"