alt Hacker News> if there is a meeting in Perth at 10AM, and the Perth timezone gets shifted, the meeting is still occurring at 10AM perth time.
The thing about this is that if Perth's time zone ever changes so erratically or with such little notice that participants need to be notified that the point-in-time of an upcoming meeting has changed, it's no longer clear whether the participants would actually want the zoned "Perth at 10am" time to be canonical.
If athletes were flying in from around the world for an international competition tomorrow at 10am, and Australia decided to increase Perth's UTC offset by 1 hour as of today, would we expect all athletes, organizers, fans, etc. to show up and do everything 1 hour earlier (by solar time)?
> The thing about this is that if Perth's time zone ever changes so erratically or with such little notice that participants need to be notified that the point-in-time of an upcoming meeting has changed
"erratically" and "with little notice" are pretty relative when it comes to timezone shifts. DST decisions have been made with as little as a week lead time, Samoa dropping an entire day off of its calendar was done with under a year lead time (noises started about 9 months prior, the act was assented 6 months prior).
> would we expect all athletes, organizers, fans, etc. to show up and do everything 1 hour earlier (by solar time)?
Usually yes.