That completely depends on when you start watching it.
The question is like asking: "Does it get light or dark outside first ?"
wane
wax and wane
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rise set wax wane
The revolving of the earth and the rotating of the moon.
the earth blocks it from the sun
During the time at sea, the sailors saw the moon wax and wane three times.
Two weeks, and two weeks to wane.
Wax and wane
The opposite of to wax is to wane. Wax means to grow and wane means to diminish
It's the earth shadow
The moon orbits the Earth every month and as it does so, we see different parts of the moon lit up by the sun, which causes the moon to go through 'phases'.
"To wax and wane" is literally "croître et décroître," but it could also be translated many other ways, depending on the context. Here are just a few other possibilities: grandir, pour ensuite diminuer; changer; évoluer; fluctuer. "Wax and wane" can also be a nominal phrase. Example: the wax and wane of power => les fluctuations du pouvoir.