Moon calendar
Moon phases in May 2025
In May 2025 the full moon falls on 12 May at 16:58 UTC, and the new moon on 27 May. 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 May 2025
| Date | Phase | Lit |
|---|---|---|
| Thu 1 | Waxing Crescent | 15% |
| Fri 2 | Waxing Crescent | 24% |
| Sat 3 | Waxing Crescent | 34% |
| Sun 4 | First Quarter First Quarter 13:53 UTC | 44% |
| Mon 5 | First Quarter | 54% |
| Tue 6 | Waxing Gibbous | 64% |
| Wed 7 | Waxing Gibbous | 73% |
| Thu 8 | Waxing Gibbous | 81% |
| Fri 9 | Waxing Gibbous | 88% |
| Sat 10 | Waxing Gibbous | 94% |
| Sun 11 | Waxing Gibbous | 97% |
| Mon 12 | Full Moon Full Moon 16:58 UTC | 99% |
| Tue 13 | Full Moon | 100% |
| Wed 14 | Waning Gibbous | 98% |
| Thu 15 | Waning Gibbous | 95% |
| Fri 16 | Waning Gibbous | 90% |
| Sat 17 | Waning Gibbous | 83% |
| Sun 18 | Waning Gibbous | 75% |
| Mon 19 | Waning Gibbous | 66% |
| Tue 20 | Last Quarter Last Quarter 12:00 UTC | 56% |
| Wed 21 | Last Quarter | 45% |
| Thu 22 | Waning Crescent | 34% |
| Fri 23 | Waning Crescent | 23% |
| Sat 24 | Waning Crescent | 14% |
| Sun 25 | Waning Crescent | 7% |
| Mon 26 | Waning Crescent | 2% |
| Tue 27 | New Moon New Moon 03:04 UTC | 0% |
| Wed 28 | Waxing Crescent | 1% |
| Thu 29 | Waxing Crescent | 5% |
| Fri 30 | Waxing Crescent | 12% |
| Sat 31 | Waxing Crescent | 20% |
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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2025
May in other years