Watch the last quarter moon of September 2022 tonight (September 17)

On Saturday (September 17), the moon will enter a phase called the last quarter – also called the third quarter – during which time it will be half lit as seen from Earth.

Both the last quartile and the third quartile of the confusing names for this stage may initially be as follows the moon half lit, but it actually refers to the fact that the moon has completed 3/4 of its orbit around it a land at this point.