FIND:
$lang['JOINED_DATE_FORMAT'] = 'F Y'; // Date format of Joined date, php date() format
REPLACE WITH:
$lang['JOINED_DATE_FORMAT'] = 'M d, Y g:i a'; // Date format of Joined date, php date() format
This will produce this result:
If you would like to remove the exact time a user registered and just keep the Month/Day/Year, try this.
OPEN: ip_root/language/your_language/lang_main_settings.php
FIND:
$lang['JOINED_DATE_FORMAT'] = 'F Y'; // Date format of Joined date, php date() format
REPLACE WITH:
$lang['JOINED_DATE_FORMAT'] = 'M d, Y'; // Date format of Joined date, php date() format
This will produce this result:
For more PHP date formats, please visit: http://us.php.net/date