On Monday, December 31, 2001 the Moon was in its waning gibbous phase, with 96% of its disk illuminated and an age of 16.7 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 | 96% |
| Moon age | 16.7 days |
| Day of the week | Monday |
| Last new moon | December 14, 2001 at 18:48 |
| Next full moon | January 28, 2002 at 20:51 (in 28.4 days) |
| Next new moon | January 13, 2002 at 11:29 (in 13.0 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, 2001 January 1, 2002 →
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, 2001 it had completed 56% of the cycle that began with the new moon on December 14, 2001.
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, 2001. For sun times, check sunrise and sunset.