Let’s say people can’t agree on the time to go to bed, and each timezone declared war on every other timezone. Who would win in this conflict? What alliances would form, and will there be betrayal? What would the new world order look like with a standard time for everyone?
GMT+8 looks good with the entire population of China on its side. GMT+1 and +2 have large chunks of Europe and Africa and could be quite strong too. The timezones in the east and west coast of the U.S. might also stand a good chance.
Probably China. It’s one nation, full of industry and under a single leadership. They could produce whatever they needed. China is one time zone.
Next competitor is the slice encompassing a large number of countries in Africa as well as most of western Europe. Huge number of people and industries contained in that slice, but they lack common leadership.