Reddit:

Basically, a failure involving iPhone and local carrier TIM has made iPhone owners wake up 1 hour earlier today.

That’s because the smartphone adjusted automatically for daylight saving time, but that year the start of the DST was postponed to November due to the second round of presidential elections and the National High School Exam.

A small fraction of Android users was affected, but problem hit mainly iPhone users.

That’s a major oops. I wonder if Apple has a mechanism in place to deal with time changes like this.