On Sunday, December 31, 2023 the Moon was in its waning gibbous phase, with 84% of its disk illuminated and an age of 18.6 days since the last new moon. The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks.
Moon data for this date
| Phase | 🌖 Waning Gibbous |
|---|---|
| Illumination | 84% |
| Moon age | 18.6 days |
| Day of the week | Sunday |
| Last new moon | December 12, 2023 at 20:32 |
| Next full moon | January 25, 2024 at 14:54 (in 25.1 days) |
| Next new moon | January 11, 2024 at 08:57 (in 10.9 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 30, 2023 January 1, 2024 →
About the waning gibbous
The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks. The phase name comes from the Moon's position in its 29.53-day cycle: on December 31, 2023 it had completed 63% of the cycle that began with the new moon on December 12, 2023.
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 31, 2023. For sun times, check sunrise and sunset.