Spring forward and Fall back – Daylight Savings time can be a curse and a blessing sometimes. Nonetheless, this morning at 2AM, many of us in the United States were gaining an extra hour of sleep since we “fell back” and reset our clocks.

iPhone owners are being made aware of an undocumented feature…glitch to be more precise when it comes to the built-in alarm clock.

Essentially the glitch in the iPhone’s operating system will cause recurring weekday alarms not to ring on time on Monday morning because of the end of Daylight Saving Time, which occurs at 2 a.m. on Sunday in the United States.

The phone’s alarm app doesn’t recognize the time change and will ring an hour late if users don’t go into the program and manually reset the alarms.

That being said, users who depend on the iPhone to wake them up should create one-time alarms specifically for Monday morning, said Apple spokeswoman Natalie Harrison.

“We suggest customers set nonrepeating alarms for now and reset after November 7 to resolve the issue,” in a statement Harrison gave to CNN.

Later this month, Apple will release an updated version of its mobile software, iOS 4.2, which will permanently fix the problem, Harrison said.

Sidenote: Apple iPhone enthusiasts taken note of the above statement – iOS 4.2 coming this month !!

This news comes after iPhone users in Australia and Europe reported problems with their alarms ringing late after time changes on those continents earlier this year.

After iPhone users in Europe woke up late on Monday, Twitter user @garrettc wrote:

“Daddy, do you remember where you were during the great iPhone alarm calamity of 2010?” “No son, I was asleep.”

If you’re in the United States and want to create an iPhone alarm that will work Monday, follow these steps:

  1. Open the Clock application.
  2. Click on the Alarm icon at the bottom of the screen.
  3. Click the “plus sign” icon in the top right corner.
  4. Create an alarm and make sure you have the “repeat” option set to “never.” (The glitch only occurs with repeat alarms, such as those workers set to wake them up at the same time each weekday).
  5. Select the appropriate time and sound, and click “save.”
  6. After November 7, you can again create repeat alarms without trouble, but you should delete any recurring alarms that you set before that date, Harrison said.

All this being said, does anyone know of an alternative alarm clock app for the iPhone that our readers could use to avoid this problem?

[hat tip CNN]