The Moon

Moon calendar for September 2025

September 2025 has 4 principal Moon phases, 13 Moon sign changes and 13 void-of-course periods. Each is listed below with its exact time.

What the phases and Moon signs mean

Times in Eastern Time (ET)

Monday, September 1

  • The Moon goes void of course in Sagittarius
  • The Moon enters Capricorn; the void of course ends

Thursday, September 4

  • The Moon goes void of course in Capricorn
  • The Moon enters Aquarius; the void of course ends

Friday, September 5

  • The Moon goes void of course in Aquarius

Saturday, September 6

  • The Moon enters Pisces; the void of course ends

Sunday, September 7

  • Full Moon in Pisces

Monday, September 8

  • The Moon goes void of course in Pisces
  • The Moon enters Aries; the void of course ends

Wednesday, September 10

  • The Moon goes void of course in Aries
  • The Moon enters Taurus; the void of course ends

Friday, September 12

  • The Moon goes void of course in Taurus
  • The Moon enters Gemini; the void of course ends

Sunday, September 14

  • Last quarter Moon in Gemini
  • The Moon goes void of course in Gemini
  • The Moon enters Cancer; the void of course ends

Tuesday, September 16

  • The Moon goes void of course in Cancer

Wednesday, September 17

  • The Moon enters Leo; the void of course ends

Friday, September 19

  • The Moon goes void of course in Leo
  • The Moon enters Virgo; the void of course ends

Sunday, September 21

  • The Moon goes void of course in Virgo
  • New Moon in Virgo
  • The Moon enters Libra; the void of course ends

Tuesday, September 23

  • The Moon goes void of course in Libra

Wednesday, September 24

  • The Moon enters Scorpio; the void of course ends

Friday, September 26

  • The Moon goes void of course in Scorpio
  • The Moon enters Sagittarius; the void of course ends

Monday, September 29

  • The Moon goes void of course in Sagittarius
  • The Moon enters Capricorn; the void of course ends
  • First quarter Moon in Capricorn

How these times are computed

Every time here comes from our own engine, built on astronomy-engine, an open-source ephemeris, and checked against independent references: the U.S. Naval Observatory's Moon phases, NASA's eclipse canon and Swiss Ephemeris outputs. The page is written in Eastern Time (ET); your browser shows the times in the zone you pick.

Void of course, traditional rule: from the Moon's last exact major aspect (conjunction, sextile, square, trine or opposition) to the Sun, Mercury, Venus, Mars, Jupiter or Saturn, until it enters the next sign. The modern rule also counts Uranus, Neptune and Pluto, so its voids can begin later and run shorter.

Astrology is a symbolic language, not a science: the positions are exact, and what they mean is interpretation.

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