Monthly Night Sky information provided by Chris Vaughan (@Astrogeoguy) at Starry Night Education (@StarryNightEdu).

- This event has passed.
Third Quarter Moon (at 20:31 GMT)
January 21 @ 7:00 pm - 10:00 pm
The moon will complete three quarters of its orbit around Earth, measured from the previous new moon, on Tuesday, January 21 at 3:31 p.m. EST or 12:31 p.m. PST, or 20:31 GMT. At the third (or last) quarter phase the moon appears half-illuminated, on its western, sunward side. It will rise around midnight local time, and then remain visible until it sets in the western daytime sky in early afternoon. Third quarter moons are positioned ahead of the Earth in our trip around the Sun. About 3½ hours later, Earth will occupy that same location in space. The week of dark, moonless evening skies that follow this phase are ideal for observing fainter deep sky targets.