Obviously no Astronaut is going to miss their teams daily standup call over this. But it’s already an issue for gps satellite precision and if you want to go i

Obviously no Astronaut is going to miss their teams daily standup call over this. But it’s already an issue for gps satellite precision and if you want to go into precise scientific experiments it’s probably also an issue, especially once we get into long-term experiments. Not to speak off a manned base. So it makes sense to consider what can be done - and a defined lunar timezone with a known (tough changing) offset would not be the worst of all options.