A going down semi lunar moon — sometimes addressed as “old moon”—is caught in the east just before aurora. At present the moon has displaced closely wholly round in its area of Earth, as calculated from one new phase of the moon to the following.
Since the moon is almost on align with the Earth and sun once more, the “day face” of the moon is looking generally aside from us again. We see entirely a thin divide of the moon’s day face: a semi lunar moon. Each dawn before aurora, as the moon is going eastward in area round Earth, the moon comes along nearer to the daybreak blaze. We discover less and less of the moon’s daytime face, and so the semi lunar in the east just before dawn seems slenderer every day.
The moon, as ever, is ascending in the east every day. But almost all people will not catch this moon stage unless they wake up early. As the sun ascends, and the sky gets vivid, the going down semi lunar moon passes. At present the moon is so close to the Earth/sun tune that the sun’s blaze is overwhelming this thin moon from perspective. Even so, the going down semi lunar is up on that point, almost daylong, displacing forward of the sun over the sky’s vault. It places in the west various hours or less before sundown.