The Moon

Moon calendar for December 2025

December 2025 has 4 principal Moon phases, 14 Moon sign changes and 14 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, December 1

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

Wednesday, December 3

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

Thursday, December 4

  • Full Moon in Gemini

Friday, December 5

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

Sunday, December 7

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

Tuesday, December 9

  • The Moon goes void of course in Leo

Wednesday, December 10

  • The Moon enters Virgo; the void of course ends

Thursday, December 11

  • Last quarter Moon in Virgo

Friday, December 12

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

Sunday, December 14

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

Wednesday, December 17

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

Friday, December 19

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

Monday, December 22

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

Tuesday, December 23

  • The Moon goes void of course in Aquarius

Wednesday, December 24

  • The Moon enters Pisces; the void of course ends

Friday, December 26

  • The Moon goes void of course in Pisces

Saturday, December 27

  • The Moon enters Aries; the void of course ends
  • First quarter Moon in Aries

Sunday, December 28

  • The Moon goes void of course in Aries

Monday, December 29

  • The Moon enters Taurus; the void of course ends

Wednesday, December 31

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

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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