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 27th, 2025 is the First Quarter phase. In this phase, exactly half of the moon is illuminated and half is in darkness.
The First Quarter phase comes roughly 7 days after the New Moon and this is when the moon has completed one quarter of its orbit around the Earth (hence the name, First Quarter). The moon will be high overhead at sunset in this phase and will be visible until mid-night, when it sets in the west.
The First Quarter of the moon phase cycle happens on one day. It’s followed by the intermediate phase, Waxing Gibbous, and will become more illuminated every day until it reaches the Full Moon phase.
Assuming it’s a clear night, the Waxing Gibbous moon will then be visible through most of the night before setting just before sunrise.
Fun fact:
Phase Details
Phase: First Quarter
Moon age: 7.2 days
Moon illumination: 46.61%
Moon tilt: 107.445°
Moon angle: 0.53
Moon distance: 377,718.93 km
Moon sign: Aries

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 First Quarter Phase
The First Quarter on December 27 has an illumination of 49%. 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 27 the Moon is 7.31 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.