3 ms·
> Normally I would have dismissed that as a coincidence, but daylight saving time also ended at 11:00pm (PT) on November 7! Huh? Unless I'm mistaken, Daylight
by et-al 2y ago
> Normally I would have dismissed that as a coincidence, but daylight saving time also ended at 11:00pm (PT) on November 7!
Huh? Unless I'm mistaken, Daylight Saving ended at 2am local time on Nov 7, 2021.
Was the bug that Day Saving is internally set based on Eastern Time (i.e. 2am ET / 11pm PT)?
- Laughsalot 2y agoThis is my understanding as well. and and Wikipedia backs me up on it [https://en.wikipedia.org/wiki/Pacific_Time_Zone#Daylight_time https://en.wikipedia.org/wiki/Pacific_Time_Zone#Daylight_tim...]. Some of the software I've written _explicitly_ disables scheduling mobile notifications during the transition periods so I was also very confused by that. Your ET speculation makes sense to me. I'll bet that whatever server/containers being used for the backend were running in the Eastern Timezone.
- waffletower 2y agoNormalizing to a zoned date (vs. an epoch representation) during a transition period is problematic. During the transition periods (unique to each daylight time zone) the temporal distance between timezones changes (increases or decreases by 1) temporarily.
- cortesoft 2y agoSounds like the library that is converting their internal eastern time representation of the datetime to local time is determining the daylight savings time before converting. Or it is just assuming a standard offset, not taking into account the 6 hours a year where eastern and western time isn't 3 hours apart