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 11th, 2025 is the Last Quarter phase, which is also sometimes known as the Third Quarter. In this phase, the moon has completed three quarters of it’s orbit around the earth and exactly half of the moon is illuminated and half is in darkness.

The Last Quarter phase comes roughly 3 weeks after the New Moon and this is when the moon has completed three quarters of its orbit around the Earth (hence the name, Last Quarter). The moon will rise around midnight on the eastern horizon, transits the meridian at sunrise, before setting at noon in the west.

The Last Quarter of the moon phase cycle happens on one day. It’s followed by the intermediate phase, Waning Crescent, and will become less illuminated every day until it reaches the New Moon phase.

Fun fact:

Phase Details

Phase: Last Quarter

Moon age: 20.43 days

Moon illumination: 58.92%

Moon tilt: -27.526°

Moon angle: 0.51

Moon distance: 386,819.52 km

Moon sign: Virgo

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 Last Quarter Phase

The Last Quarter on December 11 has an illumination of 52%. 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 11 the Moon is 21.98 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