On Friday, December 31, 1999 the Moon was in its waning crescent phase, with 37% of its disk illuminated and an age of 23.6 days since the last new moon. Only a thin sliver is left, visible in the east shortly before dawn, as the cycle prepares to start over with the new moon.
Moon data for this date
| Phase | 🌘 Waning Crescent |
|---|---|
| Illumination | 37% |
| Moon age | 23.6 days |
| Day of the week | Friday |
| Last new moon | December 7, 1999 at 20:32 |
| Next full moon | January 21, 2000 at 02:41 (in 20.6 days) |
| Next new moon | January 6, 2000 at 16:14 (in 6.2 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 30, 1999 January 1, 2000 →
About the waning crescent
Only a thin sliver is left, visible in the east shortly before dawn, as the cycle prepares to start over with the new moon. The phase name comes from the Moon's position in its 29.53-day cycle: on December 31, 1999 it had completed 79% 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 31, 1999. For sun times, check sunrise and sunset.