Daylight saving time will kick in this weekend, but that's not when many computers are programmed to expect it. Getting ready for the time change has proved thorny for businesses, and even workers whose systems are now patched could see some calendar items showing up an hour off.

Here's a list of some commonly asked questions and answers regarding the time shift.

Q: So, daylight saving time is coming a couple of weeks early. What's the big deal? ...