Moon calendar
Moon phases in September 2027
In September 2027 the full moon falls on 15 September at 23:05 UTC, and the new moon on 30 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
- First Quarter
- Full Moon
- Last Quarter
- New 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 2027
| Date | Phase | Lit |
|---|---|---|
| Wed 1 | New Moon | 0% |
| Thu 2 | Waxing Crescent | 2% |
| Fri 3 | Waxing Crescent | 7% |
| Sat 4 | Waxing Crescent | 14% |
| Sun 5 | Waxing Crescent | 23% |
| Mon 6 | Waxing Crescent | 32% |
| Tue 7 | First Quarter First Quarter 18:32 UTC | 42% |
| Wed 8 | First Quarter | 52% |
| Thu 9 | Waxing Gibbous | 62% |
| Fri 10 | Waxing Gibbous | 71% |
| Sat 11 | Waxing Gibbous | 79% |
| Sun 12 | Waxing Gibbous | 86% |
| Mon 13 | Waxing Gibbous | 92% |
| Tue 14 | Waxing Gibbous | 96% |
| Wed 15 | Full Moon Full Moon 23:05 UTC | 99% |
| Thu 16 | Full Moon | 100% |
| Fri 17 | Full Moon | 99% |
| Sat 18 | Waning Gibbous | 96% |
| Sun 19 | Waning Gibbous | 91% |
| Mon 20 | Waning Gibbous | 84% |
| Tue 21 | Waning Gibbous | 75% |
| Wed 22 | Waning Gibbous | 66% |
| Thu 23 | Last Quarter Last Quarter 10:22 UTC | 55% |
| Fri 24 | Last Quarter | 44% |
| Sat 25 | Waning Crescent | 33% |
| Sun 26 | Waning Crescent | 22% |
| Mon 27 | Waning Crescent | 13% |
| Tue 28 | Waning Crescent | 6% |
| Wed 29 | Waning Crescent | 2% |
| Thu 30 | New Moon New Moon 02:37 UTC | 0% |
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.
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