Apple: Delete and reset your iPhone clock’s recurring alarms

“Y2K this is not. There are no worries that planes will fall from the sky. Yet when Europeans turned their clocks back during the wee hours Monday in accordance with the end of daylight-saving time, iPhones hiccuped,” Adam Satariano reports for Bloomberg Businessweek.

“The phone’s primary clock, which is synced with a server somewhere in the cloud, recorded the time change just fine. So-called recurrent alarms, those set by users to sound at the same time on given days, did not,” Satariano reports. “Those who relied on their phones to wake them at, say, 6:45 every weekday ended up snoozing until 7:45.”

“The software bug has its roots in the Congress. In 2005, legislators amended the Uniform Time Act to extend daylight-saving time, starting in 2007. The change, intended to prolong the number of daylight hours and thus conserve energy, means Americans move their clocks back a week later than Europeans do. The recurrent alarm feature in the latest iPhone software didn’t account for the discrepancy,” Satariano reports. “After Sunday, when the United States ends its prolonged daylight-saving time, the clocks of the DST-observing world will be in sync again, and the problem should be moot. Until March, that is, when DST begins again.”

“Natalie Harrison, an Apple spokeswoman, says the company is aware of the issue. Harrison told CNN that iPhone users in the United States must also remember to delete and then reset their phone’s alarm clock – otherwise they may be an hour late for work on Monday morning,” Satariano reports. “The company says it will deliver a fix along with a scheduled software update this month.”

Read more in the full article here.


  1. @steve

    What are you talking about, you still want your alarm to go off at say 6am whether it’s day light saving or not. You should not need to adjust your alarms as they should go off when your phone says 6am, which automatically adjusts

  2. Congress did this to save money.. We would all theoretically turn on our morning lights an hour earlier – later in the Fall during our morning routine.

    As a software developer I can tell you the first year this law went into place it cost hundreds of millions of dollars in IT software changes. It was almost as big as Y2K. Good for my business, but easily offsetting any savings to our electric grid. Al Gore is smiling somewhere in his private jet (blasting jet fuel exhaust).

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