It look like Apple's iOS really dislikes Daylight Savings Time as iPhones are hit by a DST bug for the fourth time since 2010! Neowin reports users of iOS 7 discovered yesterday that the Calendar display offsets the "current time" by one hour, although alarms and calendar events are correctly timed and displayed.
The bug was first reported at AppleInsider where users also uploaded images and described the issue, for example, at 12:15 p.m., the calendar app draws the "current time" line in the slot for 1:15 p.m., despite displaying the correct time beside the line and in the system notification bar.
Back in 2010 a similar issue hit iPhone users, an alarm set for 5:55 am went off at 4:55 am instead; the issue only affected iPhones running iOS 4.1, and affected recurring alarms, even if the time was set correctly. Then in 2011 another bug hit iOS where DST simply wasn't recognised, causing similar issues with with people relying on alarms to start their day, or in some cases the devices updated for the time change but then reverted back to DST.
Hopefully, Apple's software developers will figure out how to implement DST correctly by next year.