On Sunday, December 20, 2026 the Moon will be in its waxing gibbous phase, with 88% of its disk illuminated and an age of 11.6 days since the last new moon. More than half of the disk is lit and the Moon already shows up in the afternoon. It stays visible most of the night, until the small hours.
Moon data for this date
| Phase | 🌔 Waxing Gibbous |
|---|---|
| Illumination | 88% |
| Moon age | 11.6 days |
| Day of the week | Sunday |
| Last new moon | December 8, 2026 at 21:52 |
| Next full moon | December 23, 2026 at 22:28 (in 3.4 days) |
| Next new moon | January 7, 2027 at 17:24 (in 18.2 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 19, 2026 December 21, 2026 →
About the waxing gibbous
More than half of the disk is lit and the Moon already shows up in the afternoon. It stays visible most of the night, until the small hours. The phase name comes from the Moon's position in its 29.53-day cycle: on December 20, 2026 it had completed 39% of the cycle that began with the new moon on December 8, 2026.
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 20, 2026. For sun times, check sunrise and sunset.