On Sunday, September 17, 1989 the Moon was in its waning gibbous phase, with 93% of its disk illuminated and an age of 17.4 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 | 93% |
| Moon age | 17.4 days |
| Day of the week | Sunday |
| Last new moon | August 31, 1989 at 02:45 |
| Next full moon | October 14, 1989 at 17:32 (in 27.2 days) |
| Next new moon | September 29, 1989 at 18:47 (in 12.3 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.
← September 16, 1989 September 18, 1989 →
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 September 17, 1989 it had completed 59% of the cycle that began with the new moon on August 31, 1989.
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 September 17, 1989. For sun times, check sunrise and sunset.