People comprehend days, they comprehend that their day starts at 00:00 and ends at 23:59. Calling to the other side of the world isn’t something most people.do on a daily basis
Not even that. I’m sure you’ve heard “it’s tomorrow when I’ve slept”, no matter what the clock says. Switching terms at midnight will cause confusion more often than not.
Are you high or just not reading what you’re writing? Are you literally claiming that people will get confused when days start at 00:00 and end at 23:59, wherever they live in the world? Because literally no one in this world, except maybe you, is confused by that, because it makes intuitive sense.