On Tuesday, December 28, 1999 the Moon was in its waning gibbous phase, with 68% of its disk illuminated and an age of 20.6 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 | 68% |
| Moon age | 20.6 days |
| Day of the week | Tuesday |
| Last new moon | December 7, 1999 at 20:32 |
| Next full moon | January 21, 2000 at 02:41 (in 23.6 days) |
| Next new moon | January 6, 2000 at 16:14 (in 9.2 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 27, 1999 December 29, 1999 →
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 28, 1999 it had completed 69% of the cycle that began with the new moon on December 7, 1999.
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 28, 1999. For sun times, check sunrise and sunset.