On Saturday, the moon enters its first quarter phase (Sept. 3). As seen from Earth, the sun illuminates the moon's disc nearly exactly to 50% during this lunar phase.
Around 230 above the southern horizon, the half-illuminated moon will be visible over New York at 7:42 p.m. ET (2342 GMT).
At around 11:12 p.m., or 3 hours and 47 minutes after sunset, the first quarter moon will set. ET
The moon rises at about noon and sets at about midnight during the first quarter phase.
This is the moon's mirror image, which is the third quarter moon, which rises at midnight and sets at noon.
The moon's roughly four-week orbital period causes the first quarter moon to appear.
As a result, the new moon, first quarter, full moon, and third quarter are separated by a roughly 29.5-day cycle.