problem with news content(start date and end date)

Hello,
i have a probleme with news content
I have add a bow of news type
The probleme is of the start date and end date wich have 1 hour later

ex : i'm define start_date field with the calendar to 08:30 and end_date to 9h30 
and i obtain this for my news in edit mode:

*****************************************
test news
27 Jan 2005 / 08:30
date dep::Thu Jan 27 09:30:00 CET 2005
date fin::Thu Jan 27 10:30:00 CET 2005
date courante:Thu Jan 27 08:31:45 CET 2005
test des news et des dates de publications

**************************

"27 Jan 2005 / 08:30" : i have define this for start date, it seems ok
but if i print the start_date and end_date in template "box_new.inc", the start date is 09h30 !
I think it's a probleme of current date and time of my server but the current date is ok : "Thu Jan 27 08:31:45 CET 2005"

and if i return to the update news box, i have 08h30 in the calendar for start_date !

perhaps somebody have idee....
thanks
sebastien