The first weekend in November officially marks the 'fall back' from Daylight Savings Time for most time zones. This is something that must be done manually on the forum, but is a simple task.
Select the User Control Panel in the upper left corner, beneath the banner.
Select the Board Preferences tab
Verify your Time Zone is correct and change if necessary
Select 'No' on the "Summer Time/DST is in effect"
Click the Submit button.
While you are in the control panel this is a great time to update your signature, add your location, etc. These items are found in the Profile tab.