Bah, if we want to start work, say, an hour after sunrise we can just do that now. We can trivially make an alarm clock that calculates sum position at a partic

Bah, if we want to start work, say, an hour after sunrise we can just do that now. We can trivially make an alarm clock that calculates sum position at a particular location. There is no technical reason that we need to argue over changing local time some even number of hours when we can do it exactly.