We had a summer time shift in the UK, but the daily quest reset time did not follow it. The new reset time (21:30) was very inconvenient for me (baby go to bed time), so I’ve asked support to revert it back. Instead, for some reason they changed it to 23:00 GMT, which really cuts my game time to 1 hr per day and is plain silly. It was not changed back despite me asking about it several times :((
On a more general bug note, one would expect you’ll grab local time from the device, or if you want it to be centralised query public NTP servers. Summer/winter time shifts are one hour only, but what happens if a user travels across several timezones? This can easily shift most playtime to sleep time, and relocation can be permanent. Hence the issue can be more serious than it seems.