So, it sounds like you're actually arguing that the numbers are just a construct and that we should all just use UTC and set appropriate work hours to the times that most correlate to the solar day in our region rather than adjust the clock approximately 1 hour per 15 degrees around the equator and have an International Date Line.
I think this would make way more sense, when they say the Olympic Opening Ceremony start at 18:00, its 18:00 for everyone around the world. No one as to work out which TZ Italy is in or scheduling meetings with Tech Support in far flung locales does not require knowing IST is how far ahead or behind.
Yes. https://en.wikipedia.org/wiki/Sandford_Fleming ( https://www.smithsonianmag.com/smithsonian-institution/sandf... )
> He promoted worldwide standard time zones, a prime meridian, and use of the 24-hour clock as key elements to communicating the accurate time, all of which influenced the creation of Coordinated Universal Time.
The one bit where this would be problematic would be "what day is it?" When does today become tomorrow?
There are a lot of systems that we've built that depend on that distinction. Things like business days and running end of day so that everything that happens on March 2nd is logged as March 2nd. I've encountered fun with Black Friday sales where the store is open over the midnight boundary and the backend system really wants today to be today rather than yesterday (sometimes this has involved unplugging a register from the network so that it doesn't run end of day, running EOD on the store systems, and then plugging the register back in after it completes and then running a reconciliation.).
Other than that particular mess of banks and businesses... yea, running everything on UTC would be something nice in today's world.
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This is also kind of what happens in China (with a complicated history). https://github.com/eggert/tz/blob/main/asia#L272
https://en.wikipedia.org/wiki/Time_in_China UTC+08:00 is observed throughout the country even though it spans about 60° of longitude.
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Aside on the "changing clocks" and realizing my flexible schedule privilege at a company I worked at I switched my schedule from 8-4 to 9-5 with the change in daylight savings so that I maintained a consistent "this is the hour I wake up".
> arguing that the numbers are just a construct
Yes.
> and that we should all just use UTC and ...
No. that does not follow. Abstraction is useful. Having commonly understood terms (in this case hours of the day) that share certain traits regardless of where you happen to be in the world facilitates communication.