Moon calendar for September 2025
Every day of September 2025 with the Moon's phase and how much of it is lit at 12:00 UTC. The new Moon, the quarters and the full Moon are marked on the day they happen in UTC.
New Moon, quarters and full Moon in September 2025
- Full Moon
- Last quarter
- New Moon
- First quarter
Times are in Coordinated Universal Time (UTC), to the minute, and agree with NASA's published table of Moon phases to within two minutes. Where your browser allows, your own clock is shown under each.
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| September 1: Waxing gibbous, 62% lit | September 2: Waxing gibbous, 71% lit | September 3: Waxing gibbous, 80% lit | September 4: Waxing gibbous, 87% lit | September 5: Waxing gibbous, 94% lit | September 6: Waxing gibbous, 98% lit | |
| September 7: Full Moon, 100% lit | September 8: Waning gibbous, 99% lit | September 9: Waning gibbous, 96% lit | September 10: Waning gibbous, 90% lit | September 11: Waning gibbous, 82% lit | September 12: Waning gibbous, 72% lit | September 13: Waning gibbous, 61% lit |
| September 14: Last quarter, 49% lit | September 15: Waning crescent, 38% lit | September 16: Waning crescent, 28% lit | September 17: Waning crescent, 19% lit | September 18: Waning crescent, 11% lit | September 19: Waning crescent, 6% lit | September 20: Waning crescent, 2% lit |
| September 21: New Moon, 0% lit | September 22: Waxing crescent, 0% lit | September 23: Waxing crescent, 3% lit | September 24: Waxing crescent, 7% lit | September 25: Waxing crescent, 12% lit | September 26: Waxing crescent, 19% lit | September 27: Waxing crescent, 27% lit |
| September 28: Waxing crescent, 36% lit | September 29: First quarter, 45% lit | September 30: Waxing gibbous, 55% lit |