- 6 Sep, 18:13 Vilnius time: new moon.
- 14 Sep, 05:07 Vilnius time: first quarter.
- 20 Sep, 20:42 Vilnius time: full moon, traditionally the Harvest Moon.
- 28 Sep, 07:41 Vilnius time: last quarter.
- During September 2040 the Moon passes through all eight phases. One full cycle takes about 29.5 days.
- The next full moon after this month is on 20 October 2040 (October 2040).
Moon phase times, September 2040
The four principal phases are moments, not whole days. Times are given in UTC and in Europe/Vilnius time.
| Date | Phase | Europe/Vilnius | UTC |
|---|---|---|---|
| Thu 6 Sep | New moon | 18:13 | 15:13 |
| Fri 14 Sep | First quarter | 05:07 | 02:07 |
| Thu 20 Sep | Full moon · Harvest Moon | 20:42 | 17:42 |
| Fri 28 Sep | Last quarter | 07:41 | 04:41 |
The sky: September 2040
Planets and sky events this month, as seen in London. The Moon's phases are in the calendar above.
Planets visible (mid-month)
No bright planets are visible in mid-month.
Events
| Sat 1 Sep | Mars and Saturn together | 1.9° apart, but not in a dark sky. |
| Sat 1 Sep | Venus and Jupiter together | 0.2° apart, but not in a dark sky. |
| Thu 6 Sep | Venus and Saturn together | 1.5° apart, but not in a dark sky. |
| Sat 8 Sep | Mercury and Jupiter together | 1.5° apart, but not in a dark sky. |
| Sat 8 Sep | The Moon near Jupiter | About 2.8° apart, but Jupiter is not visible that night. |
| Sat 8 Sep | The Moon near Mercury | About 4.3° apart, but Mercury is not visible that night. |
| Sat 8 Sep | The Moon near Saturn | About 1.4° apart, but Saturn is not visible that night. |
| Sun 9 Sep | The Moon near Venus | About 2.8° apart, but Venus is not visible that night. |
| Sun 9 Sep | The Moon near Mars | About 3.0° apart, but Mars is not visible that night. |
| Thu 13 Sep | Venus and Mars together | 0.2° apart, but not in a dark sky. |
| Thu 20 Sep | Mercury and Mars together | 2.3° apart, but not in a dark sky. |
| Wed 26 Sep | Mercury farthest from the Sun | 26° in the evening sky. Too low at this latitude this time, hard to see. |
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 2040
| Date | Time (UTC) | Traditional name | |
|---|---|---|---|
| Sun 29 Jan | 07:54 | Wolf Moon | next |
| Tue 28 Feb | 00:59 | Snow Moon | |
| Wed 28 Mar | 15:11 | Worm Moon | |
| Fri 27 Apr | 02:37 | Pink Moon | |
| Sat 26 May | 11:47 | Flower Moon | |
| Sun 24 Jun | 19:19 | Strawberry Moon | |
| Tue 24 Jul | 02:05 | Buck Moon | |
| Wed 22 Aug | 09:09 | Sturgeon Moon | |
| Thu 20 Sep | 17:42 | Harvest Moon | |
| Sat 20 Oct | 04:50 | Hunter’s Moon | |
| Sun 18 Nov | 19:06 | Beaver Moon | |
| Tue 18 Dec | 12:15 | Cold Moon |
New moon dates 2040
| Date | Time (UTC) | |
|---|---|---|
| Sat 14 Jan | 03:25 | next |
| Sun 12 Feb | 14:24 | |
| Tue 13 Mar | 01:46 | |
| Wed 11 Apr | 14:00 | |
| Fri 11 May | 03:28 | |
| Sat 9 Jun | 18:03 | |
| Mon 9 Jul | 09:14 | |
| Wed 8 Aug | 00:26 | |
| Thu 6 Sep | 15:13 | |
| Sat 6 Oct | 05:26 | |
| Sun 4 Nov | 18:56 | |
| Tue 4 Dec | 07:33 |
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 2040
No eclipse data for 2040.
The waning moon is traditionally a time for finishing
Questions people ask
When is the full moon in September 2040?
The full moon is on 20 September 2040. Its traditional name is the Harvest Moon. The exact time is in the table on this page.
When is the new moon in September 2040?
The new moon is on 6 September 2040. 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.