Apple is providing software updates for Mac OS X 10.3, 10.4 and later based on worldwide time zone information available as of January 8, 2007.

To make sure that your clock maintains the proper time, simply install the updates that are shown for your computer in Software Update. You should install these updates even if your computer is used in a time zone that is not affected. For more details about the available updates, or if you have an earlier Mac OS version, see below.

Go to: http://docs.info.apple.com/article.html?artnum=305056 for information if you are running an older operating system.