Moon calendar
Moon phases in August 2025
In August 2025 the full moon falls on 9 August at 07:56 UTC, and the new moon on 23 August. 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
- First Quarter
August 2025 carries two first quarters. A lunar month is 29.53 days, so a long month occasionally holds the same phase twice.
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 August 2025
| Date | Phase | Lit |
|---|---|---|
| Fri 1 | First Quarter First Quarter 12:42 UTC | 45% |
| Sat 2 | First Quarter | 55% |
| Sun 3 | Waxing Gibbous | 64% |
| Mon 4 | Waxing Gibbous | 73% |
| Tue 5 | Waxing Gibbous | 81% |
| Wed 6 | Waxing Gibbous | 88% |
| Thu 7 | Waxing Gibbous | 94% |
| Fri 8 | Waxing Gibbous | 98% |
| Sat 9 | Full Moon Full Moon 07:56 UTC | 100% |
| Sun 10 | Full Moon | 99% |
| Mon 11 | Waning Gibbous | 97% |
| Tue 12 | Waning Gibbous | 91% |
| Wed 13 | Waning Gibbous | 84% |
| Thu 14 | Waning Gibbous | 75% |
| Fri 15 | Waning Gibbous | 64% |
| Sat 16 | Last Quarter Last Quarter 05:13 UTC | 53% |
| Sun 17 | Last Quarter | 41% |
| Mon 18 | Waning Crescent | 30% |
| Tue 19 | Waning Crescent | 20% |
| Wed 20 | Waning Crescent | 12% |
| Thu 21 | Waning Crescent | 6% |
| Fri 22 | Waning Crescent | 2% |
| Sat 23 | New Moon New Moon 06:07 UTC | 0% |
| Sun 24 | New Moon | 1% |
| Mon 25 | Waxing Crescent | 3% |
| Tue 26 | Waxing Crescent | 8% |
| Wed 27 | Waxing Crescent | 14% |
| Thu 28 | Waxing Crescent | 21% |
| Fri 29 | Waxing Crescent | 29% |
| Sat 30 | Waxing Crescent | 38% |
| Sun 31 | First Quarter First Quarter 06:25 UTC | 48% |
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
August in other years