think how much easier it will be to plan anything that spans timezones Unless you expect all the Auzzies to move to the night shift, it just becomes more of a

think how much easier it will be to plan anything that spans timezones Unless you expect all the Auzzies to move to the night shift, it just becomes more of a pain in the ass. You still have to line the phase of the day and timezones help simplify that by doing the work upfront. You could switch to only using UTC outright for all your planning today. But even if you do, you'll find there is still a translation step of figuring out that business hours at location X are Y-Z UTC. Timezones make juggling the offsets easier, and also give you a stronger ability to roughly predict someone's schedule (like what time the business day starts, or not planning something during their lunch) just based on geography.