Help Desk

Apple Technical Information on DST Changes

Apple's Daylight Savings Time Information is a technical document explaining changes.

To make sure that your clock maintains the proper time, simply install the updates that are shown for your computer in Software Update. In addition, this will make sure you have the latest updates available for security updates as well. You may have to run software update a few times to catch ALL of the software updates.

After running all of the Software Updates, make sure you have repaired the disk permissions. The Repair Permissions document explains how to do this.

Mac OS X 10.4 Users

The 2007 time zone and Daylight Saving Time rule changes for the United States and most of Canada are already available in Mac OS X 10.4.5 or later. Apple has more information located here in this article.

Daylight Savings Time Update (Tiger) [8.6 MB]

Mac OS X 10.3 Users

If you've not already done so, install Mac OS X Panther 10.3.9 and the Daylight Saving Time Update. For more information about this update, see this article.

Daylight Savings Time Update (Panther) [4.3 MB]

Mac 10.0.x through 10.2.8 users

If you're still using Mac OS X 10.2.8 or earlier, you can adjust your clock manually using Date & Time preferences. Deselect the option to set date and time automatically, then set the time for your local time zone as needed.

Mac OS 9.2 and earlier

Still using Mac OS 9.2? Use the Date and Time control panel to deselect the option to observe Daylight Saving Time changes automatically, then enable Daylight Saving Time manually. Applications that run in the Classic environment of Mac OS X will honor the Daylight Saving Time setting in Mac OS X.

JAVA

In addition to the Mac OS X updates listed above, the Java environment requires an additional update for compatibility with the time zone and DST changes described above.

For Mac OS X 10.4 and Mac OS X Server 10.4, install Java for Mac OS X 10.4, Release 5. For more information about this update, see this article.

Java for Tiger (10.4). The update is available as a 83 MB standalone download

For Mac OS X 10.3 and Mac OS X Server 10.3, install Java for Mac OS X 10.3, Update 5. For more information about this update, see this article.

Java for Panther (10.3). The new release is available as a 38 MB standalone download.

Microsoft Office Update for Daylight Savings Time

Make sure that you run the Microsoft Office AutoUpdater, normally located in the utilities folder located in your Applications folder. The Microsoft Office AutoUpdater may sometimes be found in the Microsoft Office folder. When properly updated the following programs will be at these versions; Word 11.3.4, Excel 11.3.3, and PowerPoint 11.3.2. Click on "Get Information" about an application to verify which version you have. More information on Microsoft Office for Macintosh is found here.