BuddyPress.org

If you’re talking about activity updates, you’ll need to apply a filter to “bp_activity_time_since” (located in bp-activity/bp-activity-templatetags.php).

Something like this in your theme’s functions.php:

function my_bp_activity_time_since($relative_time, $activity) {
// use date parameters – http://php.net/manual/en/function.date.php
return date(‘FORMAT YOUR TIME’, $activity->date_recorded );
}
add_filter( ‘bp_activity_time_since’, ‘my_bp_activity_time_since’, 1, 2 );