Sure, for now; but I feel like it'd be aesthetically pleasing in some sense to try for something more objective—i.e. to predetermine the sort of timekeeping methods we would need upon establishing trade relations with a universe full of aliens, and then to use those methods in advance. Like a Society for Creative Anachronism meeting where the target period is forward in time rather than backward.

Given that we have no idea whether aliens even exist — and that life on Earth both literally and figuratively revolves around the Sun — that strikes me as the ultimate premature optimization.

If we ever meet aliens that also happen to be advanced enough to trade with, we will have already solved this issue ourselves because we’re cruising around in the Enterprise and needed a new timekeeping system by that point, or the Enterprise came to us and they will have their own timekeeping system that we can adopt.

Before then? Eh. Objectivity is overrated and an imperfect time system is a nice reminder that life doesn’t revolve around us and what we want.