We already have Mars time which is based on Mars Sols. Once we get to the point that we have to worry about galactic time, society will (hopefully) have a bett

We already have Mars time which is based on Mars Sols. Once we get to the point that we have to worry about galactic time, society will (hopefully) have a better understanding of relativity and how time isn't really linear anyway. Also, at the point that we have scheduling issues between planets, we'll have some pretty crazy infrastructure in place! By then, we should have figured out that timezones are pretty silly inventions to keep bringing forward. It would be really cool if we could just skip to that step.