On Thursday, September 11, 2025 the Moon was in its waning gibbous phase, with 78% of its disk illuminated and an age of 19.4 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 | 78% |
| Moon age | 19.4 days |
| Day of the week | Thursday |
| Last new moon | August 23, 2025 at 03:06 |
| Next full moon | October 7, 2025 at 00:47 (in 25.5 days) |
| Next new moon | September 21, 2025 at 16:54 (in 10.2 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.
← September 10, 2025 September 12, 2025 →
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, 2025 it had completed 65% of the cycle that began with the new moon on August 23, 2025.
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, 2025. For sun times, check sunrise and sunset.