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What happens exactly if you set your alarm for 1:30AM on DST changes. Does it go off twice in Autumn and skip altogether in Spring?
by cameronh90 3y ago
What happens exactly if you set your alarm for 1:30AM on DST changes. Does it go off twice in Autumn and skip altogether in Spring?
- Uehreka 3y agoThe whole DST time change is predicated on the fact that almost nobody sets alarms (or does anything time-sensitive) at 130AM local time. So yeah, if you do that, that’ll happen.
- tshaddox 3y agoIs that actually true though? Does, say, an iPhone actually fire the alarm both times the clock flips to 1:30am? I tried Googling it but I could only find info about missing alarms entirely when springing forward. I also found some info about how cron works but even then the answer was “it depends which version of cron you’re using.”
- ska 3y agoYou don't even need timezones or DST to run into issues along these lines. Let's say you have have a repeating 7am alarm on your phone. What should happen if you want to set it to 8am for one day? I mean, without walking you through a dialog that looks like: do you mean today 8, or tomorrow 8?