On Friday, September 11, 1987 the Moon was in its waning gibbous phase, with 88% of its disk illuminated and an age of 18.1 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 | 88% |
| Moon age | 18.1 days |
| Day of the week | Friday |
| Last new moon | August 24, 1987 at 08:58 |
| Next full moon | October 7, 1987 at 01:12 (in 25.6 days) |
| Next new moon | September 23, 1987 at 00:08 (in 11.5 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 10, 1987 September 12, 1987 →
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 11, 1987 it had completed 61% of the cycle that began with the new moon on August 24, 1987.
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 11, 1987. For sun times, check sunrise and sunset.