That is blaming a symptom for a problem. The fact people "expect" the sun to rise between 4-6am and go down between 6-9pm is just a product of a broken timekeeping system from two hundred years ago.
"Time" is not a thing that cares what side of the planet you are on, and it makes international scheduling and communication literally hell when you have to calculate time zones.
If we are going to fix time, we should switch everyone to UTC time. If you want to go to work in the dark and leave when the sun rises, have your company schedule hours accordingly. Changing DST now doesn't change that, your business is still setting hours arbitrarilly based around an archaic model of "wake up at 7 work 9-5 go to bed at 11" no matter where you are on the planet. It just makes no sense, and is simply culturally normative so people expect it and structure their internal model of time around it.
Except that isn't realistic at all to how people would behave without time zones.
For one, there is no permutation of the multiverse where after abolishing time zones people keep the cancer that is DST.
For two, nobody today just randomly calls other people they are familiar with during arbitrary hours dictated by social normative time frames without expecting conflict. You "thinking" I'll be available from 6 to 10 local time every night does not account for individual behavior. Some people do work night shift. Some people get up earlier, or later, or they go out at night. You can always call people at inopportune times, and it takes personal familiarity with someone to understand their personal time in the first place.
Additionally, you need a conversion right now to call someone on the other side of the world. That conversion is from your current time zone to theirs. It would be obviously expected people in post-TZ world would do the same calculation for unknown points of contact - plug in their longitude and yours and the difference is the hourly offset from your "daylight hours" on average.
Time zones, as they exist, are wholly arbitrary and do not accurately reflect universal daylight hours globally to begin with. You are as often wrong as you are right when you assume their time zone correlates to your waking hours and culturally normative scheduling because the time zones themselves remain arbitrary.
In the real world, post TZ, people would regularly communicate the best times to call you. You know, like you already do now. And for those you are unfamiliar with, you do the same calculations anyway - you find the difference in daylight hours between you both to find the difference in expected scheduling. That never changes, and if anything the math required is less obfuscated without time zones because you don't have all the edge cases when the time zone lines fail to accurately represent daylight hours (as is the case in all the DST conflicts between countries and time zones that obey it or not).
I went to a school that had different timetables in winter and summer, so I think that is a counterexample to the assertion that people wouldn't do DST without time zones.
> Changing DST now doesn't change that, your business is still setting hours arbitrarilly based around an archaic model of "wake up at 7 work 9-5 go to bed at 11" no matter where you are on the planet. It just makes no sense, and is simply culturally normative so people expect it and structure their internal model of time around it.
It actually makes a certain amount of sense. There are people who have to work in the daytime, e.g. because they work outside. Farmers, construction workers, etc. Then their administrative staff needs to work at the same time as the outside workers, and their customers and suppliers need to work at the same time as the administrative staff, etc. So everybody works 9-5, where "9-5" is some approximation to daylight hours.
Except you are conflating "work in the daytime" with "work 9-5". There is absolutely nothing wrong with your sunlight hours where people work being from 1900-0300 rather than 0900 to 1700 hours.
If you made that switch everyone living in an area will get used to the times the sun rises and sets, and the normal work hours of the locale based off universal time rather than arbitrary regional timezones or DST. When you travel, you don't have to have migraines trying to manage the clocks, because your clock is always right. You would still have the same trouble adapting to another regional work cycle than you would now - you just remove the unnecessary burden of arbitrary timezones to make everyones sunrise happen at "roughly the same numerical time but never at the same actual time".
If you're not actually going to change the times that things happen then nothing stops you from using UTC already. The whole problem with daylight savings time isn't that you have to change your clock, it's that you have to change your schedule.
It would be excellent if everybody responded to daylight savings time by scheduling work to happen from 10-6 instead of 9-5, so that nothing actually changed but the clock. But that obviously only works if everybody does it.
Unless international scheduling and communication are plunged into eternal flames and tortured by demons, DST can't really be said to make them literally hell.
"Time" is not a thing that cares what side of the planet you are on, and it makes international scheduling and communication literally hell when you have to calculate time zones.
If we are going to fix time, we should switch everyone to UTC time. If you want to go to work in the dark and leave when the sun rises, have your company schedule hours accordingly. Changing DST now doesn't change that, your business is still setting hours arbitrarilly based around an archaic model of "wake up at 7 work 9-5 go to bed at 11" no matter where you are on the planet. It just makes no sense, and is simply culturally normative so people expect it and structure their internal model of time around it.