at the first time I have this problem too.
but now I am sure this is not pical problem.
this problem happens coz day light saving time (DST).
in my country Indonesia (GMT+7) we dont use DST.
When I post an article or forum inside xoops, the time appeared is +1 hour than my computer clock (running my website on localhost, at my computer).
I dont know how to solve this. coz the PHP looks like enable this DST for this month (May), or maybe I applied wrong setting on my computer?
when I running php script like this:
<?
echo date("H:i:s");
?>
it printed 20:00 (i run this script on 19:00)

I am sure I set the correct time zone on my computer, xoops setting, default setting, and my xoops account.
how to disable DST in my xoops and other xoops modules will follow.

the other problem, when I change clock day border in pical preference to 05:00, the order and the time of pical calendar events was messed up. is this because the above mistake?