Daylight Savings Time ends at 2 a.m. Sunday morning, so don't forget to set your clocks back one hour to account for the shift.
Yep, you've probably heard that a dozen times already. Have you heard this, though? Those with Apple iPhones running iOS4.1, that also use their alarm clock to wake up, may be late to work/school on Monday morning.
Due to a bug in the software, the alarm clock is essentially not recognizing the DST switch. So, it'll go off an hour late. Which sucks. If you want to wake up on time Monday, here are some handy recommendations from Apple that should solve the problem until iOS4.2 is released.
To resolve this behavior for existing alarms, set the repeat interval to Never. You will need to reset these alarms for each day you need them.
After November 7th, 2010, you can set your alarms to repeat again.
That's kind of a pain, you could always just set your alarm to wake you up an hour earlier (if you need to be up at 7 a.m., set it for 6 a.m. and you'll be up on time).