Of interest: Daylight Saving Time Issues with Alarms on Apple iPhones

As I noted earlier today, It’s Time To Fall Back An Hour in the US and Canada as Daylight Saving Time Ends This Sunday.

I know of several customers who use Apple iPhones in their Windows environments and of note is an issue in Apple’s iOS that impacted their European customers recently…

Apple notes this issue in their article on iOS 4.1: Repeating alarms may trigger incorrectly before or after DST change (

Symptoms: In some regions, shortly before or after the daylight saving time (DST) change, repeating alarms created in the Clock app may work incorrectly.

Products Affected: iPod touch (4th generation), iPod touch (3rd generation), iPhone 3G, iPhone 4, iPhone 3GS, iPod touch (2nd generation)

Resolution: 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.

Users of the iPhone and iOS should please note that there may also be a problem for systems over this coming weekend (thanks, Will) with the move to DST in North America:

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," she told CNN.

Of course, good to know that “Later this month, Apple will release an updated version of its mobile software, iOS 4.2, which will permanently fix the problem, Harrison said.”

It’s not clear whether or not this update will be available prior to the upcoming "fall back".


Tags: Microsoft, Daylight Saving Time, Daylight Savings Time,DST:

References to DST on Bing: 15,400,000 (up several million items); 15,500,000; 2,890,000.

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