This will not happen in the real world. There is simply no incentive big enough to make the whole world agree on this. Hell, we can't even agree to slightly red

This will not happen in the real world. There is simply no incentive big enough to make the whole world agree on this. Hell, we can't even agree to slightly reduce CO2 emissions. Interestingly, though, China works on a single time zone. So for a small-scale case study in how this would work, go live in different parts of China for a year.