Moon calendar
Moon phases in May 2027
In May 2027 the full moon falls on 20 May at 11:00 UTC, and the new moon on 6 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
- New Moon
- First Quarter
- Full Moon
- Last Quarter
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 2027
| Date | Phase | Lit |
|---|---|---|
| Sat 1 | Waning Crescent | 30% |
| Sun 2 | Waning Crescent | 21% |
| Mon 3 | Waning Crescent | 14% |
| Tue 4 | Waning Crescent | 7% |
| Wed 5 | Waning Crescent | 3% |
| Thu 6 | New Moon New Moon 11:00 UTC | 0% |
| Fri 7 | New Moon | 1% |
| Sat 8 | Waxing Crescent | 3% |
| Sun 9 | Waxing Crescent | 9% |
| Mon 10 | Waxing Crescent | 16% |
| Tue 11 | Waxing Crescent | 26% |
| Wed 12 | Waxing Crescent | 37% |
| Thu 13 | First Quarter First Quarter 04:45 UTC | 48% |
| Fri 14 | First Quarter | 59% |
| Sat 15 | Waxing Gibbous | 70% |
| Sun 16 | Waxing Gibbous | 79% |
| Mon 17 | Waxing Gibbous | 87% |
| Tue 18 | Waxing Gibbous | 93% |
| Wed 19 | Waxing Gibbous | 98% |
| Thu 20 | Full Moon Full Moon 11:00 UTC | 100% |
| Fri 21 | Full Moon | 100% |
| Sat 22 | Waning Gibbous | 98% |
| Sun 23 | Waning Gibbous | 94% |
| Mon 24 | Waning Gibbous | 88% |
| Tue 25 | Waning Gibbous | 82% |
| Wed 26 | Waning Gibbous | 74% |
| Thu 27 | Waning Gibbous | 65% |
| Fri 28 | Last Quarter Last Quarter 13:59 UTC | 56% |
| Sat 29 | Last Quarter | 46% |
| Sun 30 | Waning Crescent | 36% |
| Mon 31 | Waning Crescent | 27% |
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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2027
May in other years