Is time faster on the earth or on the moon? Why?

Let's suppose that we use the sun to make calendars. Because the rotation periods of celestial bodies in the solar system are different from those in period of revolution, their days are also very different. Take the moon for example. Every time the same moon is separated by 29.5 days, it means that somewhere on the moon, another sunrise can be seen every 29.5 days. This is the length of "Moon Day". A year on the moon is equivalent to the sun moving (visually) to the same constellation, which is the same as a year on earth (365.24 days) on average. However, because the moon is sometimes ahead of the earth and sometimes behind it in orbit, the length of the "Moon Year" varies greatly (up to more than 3 hours). By the way, because the mission time is short (only a few hours), the watch worn by astronauts on the moon shows the time of the earth. But one day, when humans immigrate to other celestial bodies, they need to make local calendars.