Moon calendar

Moon phases in September 2031

The full moon falls on 1 September 2031.

Phases

Full moon1 September 2031 at 09:21 UTC364,376 km away
Last quarter8 September 2031 at 16:14 UTC400,200 km away
New moon16 September 2031 at 18:47 UTC393,438 km away
First quarter24 September 2031 at 01:20 UTC371,023 km away
Full moon30 September 2031 at 18:58 UTC373,469 km away

Perigee and apogee

Event	Date and time (UTC)	Distance
Apogee	11 September 2031 at 11:54	404,994 km
Perigee	27 September 2031 at 07:06	366,832 km

The Moon's distance varies by more than 40,000 km over a month. At perigee the disc appears about 14% wider than at apogee — a difference that is obvious in a photograph and almost impossible to judge by eye, since there is nothing in the sky to compare it to.

Times from an ELP-derived lunar theory, accurate to within one arcminute. Watch the phase change in the live simulation. A new moon is when a solar eclipse becomes possible; a full moon, a lunar one.