Last modified: 2012-05-03 02:42:43 UTC
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.
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 />';
And the bug is a regression from 1.18.
Merged above fix (r111882): In REL1_19 with r112798 In 1.19wmf1 with r112797