[hawork]

Originally Posted by calorie

Check the ACP -> vBulletin Options -> Date and Time Options: Default Time Zone Offset and Enable Daylight Savings. Also click the question marks for additional information about those settings.

I've done so and it appears as the correct time to guests, but if they register... they get the time one hour behind.

Pressing the question mark:

If the time zone for the Default Time Zone Offset is currently in Daylight Savings time, set this to Yes. Remember, this only affects guests and those not logged in. Registered, logged-in users can set their own DST options in their User CP.

Well, but how can I make them have the correct time when they register? Most of them don't even know there is a User CP.