You might (like me) have thought that the server time was out by an hour. But it’s not, you just need to toggle the following setting in your profile:
Though actually, for unregistered users the server time is out by an hour. I guess there’s a global equivalent to the above the site admins should toggle for unregistered users. Not that it’s all that important!
Should be fixed now, the server timezone is set to GMT and phpBB was configured to default to UTC+1 if not configured from your profile.