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I’m storing MySQL DateTimes in UTC, and let the user select their time zone, storing that information.
However, I want to to some queries that uses group by a date. Is it better to store that datetime information in UTC (and do the calculation every time) or is it better to save it in the timezone given? Since time zones for users can change, I wonder.
Thanks
Generally always store in UTC and convert for display, it’s the only sane way to do time differences etc. Or when somebody next year decides to change the summer time dates.