We'll never be done with timezones as long as we have biological ties to the Sun. Even if you mandate that wallclocks agreed everywhere on Earth, everyone woul

We'll never be done with timezones as long as we have biological ties to the Sun. Even if you mandate that wallclocks agreed everywhere on Earth, everyone would need a replacement to know when someone is likely to respond: Is it too late to call Grandpa? and: When should I schedule this business meeting?