- 4 May, 16:51 Vilnius time: first quarter.
- 12 May, 19:56 Vilnius time: full moon, traditionally the Flower Moon.
- 20 May, 14:58 Vilnius time: last quarter.
- 27 May, 06:02 Vilnius time: new moon.
- During May 2025 the Moon passes through all eight phases. One full cycle takes about 29.5 days.
- The next full moon after this month is on 11 June 2025 (June 2025).
Moon phase times, May 2025
The four principal phases are moments, not whole days. Times are given in UTC and in Europe/Vilnius time.
| Date | Phase | Europe/Vilnius | UTC |
|---|---|---|---|
| Sun 4 May | First quarter | 16:51 | 13:51 |
| Mon 12 May | Full moon · Flower Moon | 19:56 | 16:56 |
| Tue 20 May | Last quarter | 14:58 | 11:58 |
| Tue 27 May | New moon | 06:02 | 03:02 |
The sky: May 2025
Planets and sky events this month, as seen in London. The Moon's phases are in the calendar above.
Planets visible (mid-month)
Events
| Sun 4 May | The Moon near Mars | About 2.0° apart. Look for Mars next to the Moon. |
| Mon 5 May | Eta Aquariids meteor shower peak | Up to 50 meteors an hour in a perfect sky. The Moon is 62% lit and will hide some fainter meteors. |
| Thu 22 May | The Moon near Saturn | About 2.5° apart. Look for Saturn next to the Moon. |
| Fri 23 May | The Moon near Venus | About 3.5° apart, but Venus is not visible that night. |
| Wed 28 May | The Moon near Jupiter | About 5.2° apart, but Jupiter is not visible that night. |
How to read the moon calendar
Each day shows its date, the share of the Moon’s disc that is lit at noon, and the Moon’s shape that day. When a full moon, new moon or quarter falls on a day, it is named at the bottom of the cell.
Illumination is the part of the disc lit by the Sun. It grows from new moon to full moon (waxing) and shrinks from full moon to new moon (waning). Each day opens its own page with every signal for that date.
Full moon dates 2025
| Date | Time (UTC) | Traditional name | |
|---|---|---|---|
| Tue 14 Jan | 22:26 | Wolf Moon | passed |
| Wed 12 Feb | 13:53 | Snow Moon | passed |
| Fri 14 Mar | 06:54 | Worm Moon | passed |
| Sun 13 Apr | 00:22 | Pink Moon | passed |
| Mon 12 May | 16:56 | Flower Moon | passed |
| Wed 11 Jun | 07:43 | Strawberry Moon | passed |
| Thu 10 Jul | 20:36 | Buck Moon | passed |
| Sat 9 Aug | 07:55 | Sturgeon Moon | passed |
| Sun 7 Sep | 18:08 | Harvest Moon | passed |
| Tue 7 Oct | 03:47 | Hunter’s Moon | passed |
| Wed 5 Nov | 13:19 | Beaver Moon | passed |
| Fri 5 Dec | 23:14 | Cold Moon | passed |
New moon dates 2025
| Date | Time (UTC) | |
|---|---|---|
| Wed 29 Jan | 12:35 | passed |
| Fri 28 Feb | 00:44 | passed |
| Sat 29 Mar | 10:57 | passed |
| Sun 27 Apr | 19:31 | passed |
| Tue 27 May | 03:02 | passed |
| Wed 25 Jun | 10:31 | passed |
| Thu 24 Jul | 19:11 | passed |
| Sat 23 Aug | 06:06 | passed |
| Sun 21 Sep | 19:54 | passed |
| Tue 21 Oct | 12:25 | passed |
| Thu 20 Nov | 06:47 | passed |
| Sat 20 Dec | 01:43 | passed |
The eight moon phases explained
Four principal phases are exact instants; the four in between are the days that connect them.
Solar and lunar eclipses in 2025
No eclipse data for 2025.
The waning moon is traditionally a time for finishing
Questions people ask
When is the full moon in May 2025?
The full moon is on 12 May 2025. Its traditional name is the Flower Moon. The exact time is in the table on this page.
When is the new moon in May 2025?
The new moon is on 27 May 2025. The Moon can’t be seen that night: it sits between Earth and the Sun with its lit side turned away.
What do the percentages mean?
They show how much of the Moon’s disc is lit at noon. 0% is new moon, 100% is full moon and 50% is a quarter.
Why does another calendar give a different date?
A phase is a moment. When it falls near midnight, the date can differ by one day between time zones. This calendar uses Europe/Vilnius time for the days.
How often is there a full moon?
About every 29.5 days. Some months have two; the second is called a Blue Moon.
- Jean Meeus, Astronomical Algorithms, 2nd ed., Willmann-Bell, 1998, chapters 48 and 49.
- NASA Eclipse Web Site (eclipse dates and visibility).
Numbers update through the day from public sources. The text for each day is written from that day’s data and checked by the editor. Every past day keeps its own page in the archive.