December 20, 2025 Current Southern Hemisphere/Tomorrow’s Northern Hemisphere Moon Phase

You can find more moon phase details on both of the websites used in this post by clicking on each hyperlink.

Source: nineplanets.org

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The Moon phase for December 20th, 2025 is the New Moon phase. In this phase, the moon is positioned between the Sun and Earth and is 0% illuminated (i.e the moon is not visible to us in the sky).

Due to the alignment of the Sun, the Moon and Earth, the side of the moon that faces Earth is left in complete darkness. In technical terms this is referred to as a conjunction or Syzygy.

Also, during the New Moon phase, the moon rises and sets at around the same time as the Sun. This brings to the moon too close to the glare of the Sun for us to see the moon with the naked eye.

Fun fact:

Phase Details

Phase: New Moon

Moon age: -0.03 days

Moon illumination: 0.04%

Moon tilt: 192.763°

Moon angle: 0.49

Moon distance: 403,112.00 km

Moon sign: Capricorn

Source: MoonGiant.com

You can use this link to go forward or backward in time for Moon phase information. If you are curious, you can even find out what phase the Moon was in when you or anyone else was born.

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Visit the December 2025 Moon Phases Calendar to see all the daily moon phase for this month.

Today’s New Moon Phase

The New Moon on December 20 has an illumination of 0%. This is the percentage of the Moon illuminated by the Sun. The illumination is constantly changing and can vary up to 10% a day. On December 20 the Moon is 0.57 days old. This refers to how many days it has been since the last New Moon. It takes 29.53 days for the Moon to orbit the Earth and go through the lunar cycle of all 8 Moon phases.

Phase Details