Moon calendar, September 2021
New Moon on 7 September at 00:51, in Virgo. Full Moon on 20 September at 23:54, in Pisces.
The Moon changes sign 13 times this month and is void of course before each change.
| Date | Moon sign | Phase | Void of course |
|---|---|---|---|
| Wed 1 | Gemini, enters Cancer at 05:25 | until 05:25 | |
| Thu 2 | Cancer | ||
| Fri 3 | Cancer, enters Leo at 15:58 | 05:37 to 15:58 | |
| Sat 4 | Leo | ||
| Sun 5 | Leo, enters Virgo at 23:05 | 14:21 to 23:05 | |
| Mon 6 | Virgo | ||
| Tue 7 | Virgo | New Moon at 00:51 | from 19:23 |
| Wed 8 | Virgo, enters Libra at 03:20 | until 03:20 | |
| Thu 9 | Libra | ||
| Fri 10 | Libra, enters Scorpio at 06:04 | 04:47 to 06:04 | |
| Sat 11 | Scorpio | ||
| Sun 12 | Scorpio, enters Sagittarius at 08:34 | 05:32 to 08:34 | |
| Mon 13 | Sagittarius | First quarter at 20:39 | |
| Tue 14 | Sagittarius, enters Capricorn at 11:34 | 10:57 to 11:34 | |
| Wed 15 | Capricorn | ||
| Thu 16 | Capricorn, enters Aquarius at 15:23 | 05:39 to 15:23 | |
| Fri 17 | Aquarius | ||
| Sat 18 | Aquarius, enters Pisces at 20:22 | 09:14 to 20:22 | |
| Sun 19 | Pisces | ||
| Mon 20 | Pisces | Full Moon at 23:54 | from 23:54 |
| Tue 21 | Pisces, enters Aries at 03:12 | until 03:12 | |
| Wed 22 | Aries | ||
| Thu 23 | Aries, enters Taurus at 12:38 | 02:04 to 12:38 | |
| Fri 24 | Taurus | ||
| Sat 25 | Taurus | from 13:09 | |
| Sun 26 | Taurus, enters Gemini at 00:36 | until 00:36 | |
| Mon 27 | Gemini | ||
| Tue 28 | Gemini, enters Cancer at 13:34 | 04:18 to 13:34 | |
| Wed 29 | Cancer | Last quarter at 01:57 | |
| Thu 30 | Cancer | from 14:48 |
Tropical zodiac · geocentric, apparent positions · Swiss Ephemeris, checked against NASA JPL DE440 · void of course: last exact conjunction, sextile, square, trine or opposition to the Sun and Mercury to Pluto · times in UTC
Go deeper: phases, signs and void of course
Phases. New Moon is the moment the Moon passes the Sun in longitude; first quarter, full and last quarter are 90°, 180° and 270° past it. Each happens at one instant worldwide; only the clock time differs by place.
Signs. The Moon crosses a sign in about two and a half days. These are tropical signs; in a sidereal (Vedic) zodiac the Moon reaches each sign about 24° later, nearly two days after the times shown.
Void of course. From the Moon’s last exact major aspect in a sign until it enters the next sign. William Lilly, in the 17th century, counted only the Sun and the five visible planets; most modern calendars add Uranus, Neptune and Pluto, so their void periods are often shorter. Switch between the two above.