The Moon on this date is Waning Gibbous, with about 76% of its disk illuminated.
Moonrise and moonset are for Seoul. Moonset is when the Moon that rose this day sets, so it can fall on the next day.
On September 12, 2025, the Moon was a waning gibbous, 19.9 days old and 76% illuminated, in the constellation Aries about 366,253 km (227,579 mi) from Earth. The next New Moon followed on September 21, 2025.
| Date | Moon | Lit | Age |
|---|---|---|---|
| 9/9 Tue | Waning Gibbous | 97% | 16.9d |
| 9/10 Wed | Waning Gibbous | 92% | 17.9d |
| 9/11 Thu | Waning Gibbous | 85% | 18.9d |
| 9/12 Fri | Waning Gibbous | 76% | 19.9d |
| 9/13 Sat | Waning Gibbous | 65% | 20.9d |
| 9/14 Sun | Waning Gibbous | 54% | 21.9d |
| 9/15 Mon | Waning Crescent | 42% | 22.9d |
Values are calculated with Astronomy Engine at 12:00 Korea Standard Time (03:00 UTC) on each date; New and Full Moon dates are in UTC. Moon age counts days since the New Moon; distance is centre to centre.