Daylight Savings Time comes three weeks early this Sunday at 2 am and could cause problems with your computer regarding calendar, emails, and other date/time sensitive programs.

What should you do? If you’ve got a PC or two, go to Microsoft and double-check the updates explained there.

If you’ve got a Mac, follow these instructions.

Palm and BlackBerry offer downloads for mobile customers, as do Nokia, Motorola, and nearly all other popular phone and PDA makers.

A lot of dumber appliances—microwave ovens, coffee makers—don’t do DST at all, so you’ll have to reset them as always. No more or less of a problem than usual.

It’s likely that the worst thing that will happen to you next week is a couple of missed meetings. There’s an easy fix for that: Edit your online calendar to include the correct time in the meeting’s subject line. That way if your computer uses the wrong timestamp, you’ll have it covered. And on Monday, wear a watch.

slate.com