2023 Calendar of Astronomical Events
2023 Phases of the Moon
Greenwich Mean Time
The following table gives the date and time of the Moon's phases for the year. If Daylight Saving Time is in effect, add one hour to the times listed.
| 2023 Phases of the Moon | |||
| Greenwich Mean Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | Jan 6 23:08 | Jan 15 02:10 |
| Jan 21 20:53 | Jan 28 15:19 | Feb 5 18:29 | Feb 13 16:01 |
| Feb 20 07:06 | Feb 27 08:06 | Mar 7 12:40 | Mar 15 02:08 |
| Mar 21 17:23 | Mar 29 02:32 | Apr 6 04:35 | Apr 13 09:11 |
| Apr 20 04:12 H | Apr 27 21:20 | May 5 17:34 n | May 12 14:28 |
| May 19 15:53 | May 27 15:22 | Jun 4 03:42 | Jun 10 19:31 |
| Jun 18 04:37 | Jun 26 07:50 | Jul 3 11:39 | Jul 10 01:48 |
| Jul 17 18:32 | Jul 25 22:07 | Aug 1 18:31 | Aug 8 10:28 |
| Aug 16 09:38 | Aug 24 09:57 | Aug 31 01:35 | Sep 6 22:21 |
| Sep 15 01:40 | Sep 22 19:32 | Sep 29 09:57 | Oct 6 13:48 |
| Oct 14 17:55 A | Oct 22 03:29 | Oct 28 20:24 p | Nov 5 08:37 |
| Nov 13 09:27 | Nov 20 10:50 | Nov 27 09:16 | Dec 5 05:49 |
| Dec 12 23:32 | Dec 19 18:39 | Dec 27 00:33 | - |
An eclipse of the Sun can only occur at New Moon (see: Solar Eclipses for Beginners), while an eclipse of the Moon can only occur at Full Moon (see: Lunar Eclipses for Beginners). In any calendar year there are a minimum of two solar and two lunar eclipses.
If an eclipse of the Sun or Moon takes place on a given date, it is noted by a character next to the date in the table above. Solar eclipses are indicated as: T=Total, A=Annular, H=Hybrid and P=Partial. Lunar eclipses are indicated as: t=Total, p=Partial, and n=Penumbral.
Phases of the Moon Photo Gallery is an image collection showing the Moon's phases over a complete synodic month.
2023 Calendar of Astronomical Events
Greenwich Mean Time
The following table gives the date and time of the important astronomical events for the year. If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.
| 2023 Calendar of Astronomical Events | ||||||||
| January - June | July - December | |||||||
Date GMT Event
(h:m)
Jan 01 15:25 Moon at Ascending Node
02 20 Mercury at Perihelion
03 19:35 Mars 0.5°N of Moon: Occn.
04 19:59 Earth at Perihelion: 0.98329
06 23:08 FULL MOON
07 13 Mercury at Inferior Conjunction
08 09:19 Moon at Apogee: 406459 km
15 02:10 LAST QUARTER
16 06:32 Moon at Descending Node
21 20:53 NEW MOON
21 20:58 Moon at Perigee: 356570 km
23 07:22 Saturn 3.8°N of Moon
23 08:20 Venus 3.5°N of Moon
25 08 Jupiter at Perihelion
26 02:00 Jupiter 1.8°N of Moon
28 15:19 FIRST QUARTER
28 16:05 Moon at Ascending Node
30 06 Mercury at Greatest Elong: 25.0°W
31 04:24 Mars 0.1°N of Moon: Occn.
Feb 04 08:55 Moon at Apogee: 406476 km
05 18:29 FULL MOON
12 07:31 Moon at Descending Node
13 16:01 LAST QUARTER
15 20 Mercury at Aphelion
16 16 Saturn-Sun Conjunction
19 09:06 Moon at Perigee: 358267 km
20 07:06 NEW MOON
22 07:57 Venus 2.1°N of Moon
22 21:58 Jupiter 1.2°N of Moon: Occn.
24 18:56 Moon at Ascending Node
27 08:06 FIRST QUARTER
28 04:32 Mars 1.1°S of Moon: Occn.
Mar 03 18:01 Moon at Apogee: 405890 km
07 12:40 FULL MOON
11 08:53 Moon at Descending Node
15 02:08 LAST QUARTER
15 23 Neptune-Sun Conjunction
17 11 Mercury at Superior Conjunction
19 15:16 Moon at Perigee: 362698 km
19 15:20 Saturn 3.6°N of Moon
20 21:25 Vernal Equinox
21 17:23 NEW MOON
24 02:08 Moon at Ascending Node
24 10:28 Venus 0.1°N of Moon: Occn.
28 13:16 Mars 2.3°S of Moon
29 02:32 FIRST QUARTER
31 11:18 Moon at Apogee: 404921 km
31 20 Mercury at Perihelion
Apr 06 04:35 FULL MOON
07 13:51 Moon at Descending Node
11 04:42 Venus-Pleiades: 2.5°S
11 21 Jupiter-Sun Conjunction
11 22 Mercury at Greatest Elong: 19.5°E
13 09:11 LAST QUARTER
16 02:22 Moon at Perigee: 367967 km
16 03:47 Saturn 3.5°N of Moon
17 16 Venus at Perihelion
20 04:12 NEW MOON
20 04:17 Ann/Total Solar Eclipse; mag=1.011
20 11:32 Moon at Ascending Node
23 13:03 Venus 1.3°S of Moon
26 02:18 Mars 3.2°S of Moon
27 21:20 FIRST QUARTER
28 06:43 Moon at Apogee: 404300 km
May 01 23 Mercury at Inferior Conjunction
04 21:57 Moon at Descending Node
05 17:23 Pen. Lunar Eclipse; mag=0.952
05 17:34 FULL MOON
08 11:27 Mars-Pollux: 4.9°S
09 21 Uranus-Sun Conjunction
11 04:57 Moon at Perigee: 369345 km
12 14:28 LAST QUARTER
13 13:04 Saturn 3.3°N of Moon
17 13 Mercury-Jupiter: 6.2°
17 13:15 Jupiter 0.8°S of Moon: Occn.
17 19:36 Moon at Ascending Node
18 01:34 Mercury 3.6°S of Moon
19 15:53 NEW MOON
23 12:08 Venus 2.2°S of Moon
24 17:32 Mars 3.8°S of Moon
26 01:39 Moon at Apogee: 404510 km
27 15:22 FIRST QUARTER
29 05 Mercury at Greatest Elong: 24.9°W
29 13:04 Venus-Pollux: 3.9°S
30 23 Mars at Aphelion
Jun 01 06:22 Moon at Descending Node
02 03:35 Mars-Beehive: 0.1°S
04 03:42 FULL MOON
04 11 Venus at Greatest Elong: 45.4°E
06 23:07 Moon at Perigee: 364860 km
09 20:19 Saturn 3.0°N of Moon
10 19:31 LAST QUARTER
11 17:50 Mercury-Pleiades: 5.9°S
13 11:05 Venus-Beehive: 0.5°N
14 00:05 Moon at Ascending Node
14 06:33 Jupiter 1.5°S of Moon
16 20:16 Mercury-Aldebaran: 4.2°N
18 04:37 NEW MOON
21 14:58 Summer Solstice
22 00:47 Venus 3.7°S of Moon
22 10:09 Mars 3.8°S of Moon
22 18:30 Moon at Apogee: 405385 km
26 07:50 FIRST QUARTER
27 19 Mercury at Perihelion
28 12:22 Moon at Descending Node
|
Date GMT Event
(h:m)
Jul 01 05 Mercury at Superior Conjunction
03 11:39 FULL MOON
04 22:28 Moon at Perigee: 360151 km
06 08:59 Earth at Aphelion: 1.01668
07 03:05 Saturn 2.7°N of Moon
10 01:48 LAST QUARTER
10 05:21 Mars-Regulus: 0.6°N
11 01:23 Moon at Ascending Node
11 21:18 Jupiter 2.2°S of Moon
14 22:33 Mercury-Beehive: 0.2°N
16 08:05 Venus-Regulus: 1.7°S
17 18:32 NEW MOON
20 06:56 Moon at Apogee: 406291 km
21 04:00 Mars 3.3°S of Moon
25 15:05 Moon at Descending Node
25 22:07 FIRST QUARTER
27 11 Mercury-Venus: 5.1°
28 18:21 Mercury-Regulus: 0.1°S
Aug 01 18:31 FULL MOON
02 05:52 Moon at Perigee: 357311 km
03 10:21 Saturn 2.5°N of Moon
07 02:46 Moon at Ascending Node
08 00 Venus at Aphelion
08 09:41 Jupiter 2.9°S of Moon
08 10:28 LAST QUARTER
10 02 Mercury at Greatest Elong: 27.4°E
10 18 Mercury at Aphelion
13 08 Mercury-Mars: 4.7°
13 11 Venus at Inferior Conjunction
16 09:38 NEW MOON
16 11:55 Moon at Apogee: 406635 km
18 23:06 Mars 2.2°S of Moon
21 16:23 Moon at Descending Node
24 09:57 FIRST QUARTER
27 08 Saturn at Opposition
30 15:51 Moon at Perigee: 357182 km
30 18:03 Saturn 2.5°N of Moon
31 01:35 FULL MOON
Sep 03 07:44 Moon at Ascending Node
04 19:44 Jupiter 3.3°S of Moon
06 11 Mercury at Inferior Conjunction
06 22:21 LAST QUARTER
12 15:42 Moon at Apogee: 406289 km
15 01:40 NEW MOON
17 19:18 Moon at Descending Node
19 10 Neptune at Opposition
22 13 Mercury at Greatest Elong: 17.9°W
22 19:32 FIRST QUARTER
23 06:50 Autumnal Equinox
23 18 Mercury at Perihelion
27 01:25 Saturn 2.7°N of Moon
28 01:05 Moon at Perigee: 359911 km
29 09:57 FULL MOON
30 16:49 Moon at Ascending Node
Oct 02 03:16 Jupiter 3.4°S of Moon
06 13:48 LAST QUARTER
09 06:08 Venus-Regulus: 2.3°S
10 03:41 Moon at Apogee: 405426 km
14 17:55 NEW MOON
14 18:00 Annular Solar Eclipse; mag=0.951
15 01:11 Moon at Descending Node
20 05 Mercury at Superior Conjunction
22 03:29 FIRST QUARTER
23 22 Venus at Greatest Elong: 46.4°W
24 07:52 Saturn 2.8°N of Moon
26 02:53 Moon at Perigee: 364873 km
28 03:14 Moon at Ascending Node
28 20:14 Partial Lunar Eclipse; mag=0.120
28 20:24 FULL MOON
29 08:10 Jupiter 3.1°S of Moon
Nov 03 04 Jupiter at Opposition
05 08:37 LAST QUARTER
06 21:49 Moon at Apogee: 404569 km
09 09:28 Venus 1.0°S of Moon: Occn.
11 08:49 Moon at Descending Node
13 09:27 NEW MOON
13 18 Uranus at Opposition
16 21:17 Mercury-Antares: 2.5°N
18 05 Mars-Sun Conjunction
20 10:50 FIRST QUARTER
20 14:02 Saturn 2.7°N of Moon
21 21:03 Moon at Perigee: 369824 km
24 11:02 Moon at Ascending Node
25 11:10 Jupiter 2.8°S of Moon
27 09:16 FULL MOON
28 09 Venus at Perihelion
29 10:27 Venus-Spica: 3.9°N
Dec 04 14 Mercury at Greatest Elong: 21.3°E
04 18:42 Moon at Apogee: 404348 km
05 05:49 LAST QUARTER
08 15:24 Moon at Descending Node
09 16:53 Venus 3.6°N of Moon
12 23:32 NEW MOON
16 18:53 Moon at Perigee: 367900 km
17 21:58 Saturn 2.5°N of Moon
19 18:39 FIRST QUARTER
20 17 Mercury at Perihelion
21 13:54 Moon at Ascending Node
22 03:28 Winter Solstice
22 14:20 Jupiter 2.6°S of Moon
22 19 Mercury at Inferior Conjunction
27 00:33 FULL MOON
|
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- Perihelion - the position in a planet's orbit closest to the Sun
- Aphelion - the position in a planet's orbit furthest from the Sun
- Perigee - the position in the Moon's orbit closest to Earth
- Apogee - the position in the Moon's orbit furthest from Earth
- Inferior Conjunction - Mercury or Venus passes between Earth and the Sun
- Superior Conjunction - Mercury or Venus passes on the opposite side of the Sun from Earth
- Greatest Elongation - elongation is the angle between the Sun and a planet as seen from Earth; during eastern elongation (E), the planet appears as an evening star; during western elongation (W), the planet appears as a morning star
- Opposition - the position in a planet's orbit when it appears opposite the Sun as seen from Earth
- Conjunction - the position in a planet's orbit when it appears closest the Sun as seen from Earth
- Occultation - the Moon occults or eclipses a star or planet
- Ascending Node - the point where a planet crosses from the southern to northern portion of its orbit
- Descending Node - the point where a planet crosses from the northern to the southern portion of its orbit
Calendars for Other Years and Time Zones
The table below contains links to astronomical events calendars for a range of years and Time Zones. Abbreviations for the time zones are: GMT = Greenwich Mean Time, AST = Atlantic Standard Time, EST = Eastern Standard Time, CST = Central Standard Time, MST = Mountain Standard Time, PST = Pacific Standard Time, AKST = Alaskan Standard Time, and HST = Hawaiian Standard Time.
| Calendar of Astronomical Events | |||||||||||||||
| GMT | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| AST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| EST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| CST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| MST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| PST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| AKST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
| HST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
For years or time zones not covered above, please visit SKYCAL the astronomical events calendar generator.