Earlier quoted context omitted.
Just because you personally are used to a specific type of clock doesn’t mean you can’t imagine a different kind. Submarines use 24 hour clocks and give no hecks about where the sun is. The solution is to just use UTC. That’s it. That means in NYC you’d get to work at 13:00 and go home at 21:00, which used to be 9am-5pm. That’s it. Your whole transition has been completed. The rest is just what your calendar says. Ni…
>That means in NYC you’d get to work at 13:00 and go home at 21:00, Fine.. so I'm going to have a teleconference with a company in NYC. Due to what you wrote above I now have an idea of what UTC time window to plan for - after all, I want to be able to reach them during their working hours. Then on Friday I have to schedule a teleconf with a company in Japan. When do they work, relative to UTC? You forgot to add that…
Except for most people it is almost never a problem because most people aren’t scheduling phone calls or meetings with unfamiliar locations.
The benefit is obvious: things that happen at the same time have the same number associated with them. Just like we currently coordinate dates using a shared calendar, we coordinate times. And that has a local benefit as well. Aside from no more daylight savings time which we can achieve using other means, we also know when world events happen as they are being reported, we know when certain things take effect for countries that span multiple timezones now, we know the exact difference between any two given time points without asking “but where are they happening?”
Again, imagine that we had unified time and some country somewhere said “hey we are using the same format but doing our own variable offset from it”. That would be absolutely asinine. We are used to timezones and think they benefit us because of that familiarity. In reality we have had variable time even in the same timezones before and it was universally a bad idea that was shut down soon as people started traveling.
Oh and consider that due to cultural differences your example of scheduling meetings is already flawed: do you know if Tokyo wraps up the workday at 4pm or 6pm? Is there an hour or two hour lunch break in Barcelona? When do people actually come to work in Rome? Are banks open on Saturdays in Baghdad? Timezones do not solve these issues whatsoever so you still need to do the lookup of “when are people actually around” when scheduling a meeting outside of your culture.