On Thursday, December 4, 2025 the Moon was in its full moon phase, with 100% of its disk illuminated and an age of 14.3 days since the last new moon. The whole disk is lit: the Moon rises as the Sun sets and stays up all night. It is the brightest and most photographed phase.
Moon data for this date
| Phase | 🌕 Full Moon |
|---|---|
| Illumination | 100% |
| Moon age | 14.3 days |
| Day of the week | Thursday |
| Last new moon | November 20, 2025 at 03:47 |
| Next full moon | December 4, 2025 at 20:14 (in about 8 h) |
| Next new moon | December 19, 2025 at 22:43 (in 15.4 days) |
The Moon on the surrounding days
Compare the phase and illumination over the three days before and after. Click a day to open its page.
← December 3, 2025 December 5, 2025 →
About the full moon
The whole disk is lit: the Moon rises as the Sun sets and stays up all night. It is the brightest and most photographed phase. The phase name comes from the Moon's position in its 29.53-day cycle: on December 4, 2025 it had completed 48% of the cycle that began with the new moon on November 20, 2025.
Looking for another date, such as a birthday? Use the Moon phase on the day I was born tool, see the Moon phase today page with the lunar calendar, or find the day of the week of December 4, 2025. For sun times, check sunrise and sunset.