From https://en.wikipedia.org/w/index.php?diff=479583262 :
While the times in the list itself is fine, the part in the box (following "in the last 72 hours, as of") shows UTC time now. I have to hope this is a bug, not a feature.
Version: 1.19
Severity: normal
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | None | T33217 MediaWiki bugs to be fixed for 1.19wmf1 deployment (tracking) | |||
| Resolved | hashar | T36835 watchlist shows times in UTC |
The relevant message is wlnote from includes/specials/SpecialWatchlist.php . It was changed by r111882 to use the user date and time. Now looks like:
$wlInfo = $this->msg( 'wlnote' )
->numParams( $numRows, round( $values['days'] * 24 ) )
->params(
$lang->userDate( $timestamp, $user ),
$lang->userTime( $timestamp, $user )
)->parse() . '<br />';