Moon calendar
Moon phases in September 2026
In September 2026 the full moon falls on 26 September at 16:50 UTC, and the new moon on 11 September. Every night of the month with its phase and how much of the Moon is lit, computed from the same engine the rest of the site runs on.
The exact moments
- Last Quarter
- New Moon
- First Quarter
- Full Moon
Times are UTC. A phase is a moment, not a night: the Moon is “full” at one instant, and looks full for a day either side of it. The live calendar works these out for your own clock and, if you let it, your own horizon.
Every night in September 2026
| Date | Phase | Lit |
|---|---|---|
| Tue 1 | Waning Gibbous | 84% |
| Wed 2 | Waning Gibbous | 75% |
| Thu 3 | Waning Gibbous | 65% |
| Fri 4 | Last Quarter Last Quarter 07:52 UTC | 54% |
| Sat 5 | Last Quarter | 42% |
| Sun 6 | Waning Crescent | 31% |
| Mon 7 | Waning Crescent | 21% |
| Tue 8 | Waning Crescent | 12% |
| Wed 9 | Waning Crescent | 6% |
| Thu 10 | Waning Crescent | 2% |
| Fri 11 | New Moon New Moon 03:27 UTC | 0% |
| Sat 12 | New Moon | 1% |
| Sun 13 | Waxing Crescent | 4% |
| Mon 14 | Waxing Crescent | 9% |
| Tue 15 | Waxing Crescent | 16% |
| Wed 16 | Waxing Crescent | 24% |
| Thu 17 | Waxing Crescent | 33% |
| Fri 18 | First Quarter First Quarter 20:44 UTC | 42% |
| Sat 19 | First Quarter | 51% |
| Sun 20 | Waxing Gibbous | 61% |
| Mon 21 | Waxing Gibbous | 70% |
| Tue 22 | Waxing Gibbous | 78% |
| Wed 23 | Waxing Gibbous | 86% |
| Thu 24 | Waxing Gibbous | 92% |
| Fri 25 | Waxing Gibbous | 97% |
| Sat 26 | Full Moon Full Moon 16:50 UTC | 99% |
| Sun 27 | Full Moon | 100% |
| Mon 28 | Waning Gibbous | 98% |
| Tue 29 | Waning Gibbous | 93% |
| Wed 30 | Waning Gibbous | 87% |
Illumination is taken at 00:00 UTC on each date. It changes by a percent or two over a day, which is why the site’s own nightly card computes it for the evening you are actually standing in.
Jump to another month
2026
September in other years