2021 Calendar of Astronomical Events
2021 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.
| 2021 Phases of the Moon | |||
| Greenwich Mean Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | - | Jan 6 09:37 |
| Jan 13 05:00 | Jan 20 21:02 | Jan 28 19:16 | Feb 4 17:37 |
| Feb 11 19:06 | Feb 19 18:47 | Feb 27 08:17 | Mar 6 01:30 |
| Mar 13 10:21 | Mar 21 14:40 | Mar 28 18:48 | Apr 4 10:02 |
| Apr 12 02:31 | Apr 20 06:59 | Apr 27 03:31 | May 3 19:50 |
| May 11 19:00 | May 19 19:13 | May 26 11:14 t | Jun 2 07:24 |
| Jun 10 10:53 A | Jun 18 03:54 | Jun 24 18:40 | Jul 1 21:11 |
| Jul 10 01:17 | Jul 17 10:11 | Jul 24 02:37 | Jul 31 13:16 |
| Aug 8 13:50 | Aug 15 15:20 | Aug 22 12:02 | Aug 30 07:13 |
| Sep 7 00:52 | Sep 13 20:39 | Sep 20 23:55 | Sep 29 01:57 |
| Oct 6 11:05 | Oct 13 03:25 | Oct 20 14:57 | Oct 28 20:05 |
| Nov 4 21:15 | Nov 11 12:46 | Nov 19 08:58 p | Nov 27 12:28 |
| Dec 4 07:43 T | Dec 11 01:36 | Dec 19 04:36 | Dec 27 02:24 |
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.
2021 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.
| 2021 Calendar of Astronomical Events | ||||||||
| January - June | July - December | |||||||
Date GMT Event
(h:m)
Jan 02 08:59 Earth at Perihelion: 0.98325
06 09:37 LAST QUARTER
09 15:39 Moon at Perigee: 367390 km
10 20:14 Moon at Descending Node
11 20:12 Venus 1.5°N of Moon
13 05:00 NEW MOON
20 21:02 FIRST QUARTER
21 13:11 Moon at Apogee: 404361 km
24 02 Mercury at Greatest Elong: 18.6°E
24 02 Saturn-Sun Conjunction
24 21:47 Moon at Ascending Node
28 19:16 FULL MOON
29 01 Jupiter-Sun Conjunction
29 02 Mercury at Perihelion
Feb 03 19:33 Moon at Perigee: 370127 km
04 17:37 LAST QUARTER
07 00:29 Moon at Descending Node
08 14 Mercury at Inferior Conjunction
11 19:06 NEW MOON
18 10:22 Moon at Apogee: 404467 km
18 22:47 Mars 3.7°N of Moon
19 18:47 FIRST QUARTER
20 05 Venus at Aphelion
21 01:44 Moon at Ascending Node
23 08 Mercury-Saturn: 4.0°
27 08:17 FULL MOON
Mar 02 05:19 Moon at Perigee: 365422 km
03 23:36 Mars-Pleiades: 2.6°S
05 05 Mercury-Jupiter: 0.3°
06 00:56 Moon at Descending Node
06 01:30 LAST QUARTER
06 11 Mercury at Greatest Elong: 27.3°W
09 23:02 Saturn 3.7°N of Moon
10 15:35 Jupiter 4.0°N of Moon
11 00 Neptune-Sun Conjunction
11 01:02 Mercury 3.7°N of Moon
13 10:21 NEW MOON
14 02 Mercury at Aphelion
18 05:04 Moon at Apogee: 405253 km
19 17:48 Mars 1.9°N of Moon
20 03:31 Moon at Ascending Node
20 09:37 Vernal Equinox
20 19:15 Mars-Aldebaran: 6.9°N
21 14:40 FIRST QUARTER
26 06 Venus at Superior Conjunction
28 18:48 FULL MOON
30 06:12 Moon at Perigee: 360311 km
Apr 02 02:41 Moon at Descending Node
04 10:02 LAST QUARTER
06 08:34 Saturn 4.0°N of Moon
07 07:15 Jupiter 4.4°N of Moon
12 02:31 NEW MOON
14 17:47 Moon at Apogee: 406120 km
16 05:53 Moon at Ascending Node
17 12:09 Mars 0.1°N of Moon: Occn.
19 02 Mercury at Superior Conjunction
20 06:59 FIRST QUARTER
27 01 Mercury at Perihelion
27 03:31 FULL MOON
27 15:24 Moon at Perigee: 357379 km
29 09:17 Moon at Descending Node
30 21 Uranus-Sun Conjunction
May 03 17:02 Saturn 4.2°N of Moon
03 19:50 LAST QUARTER
04 03:03 Mercury-Pleiades: 2.1°S
04 21:00 Jupiter 4.6°N of Moon
11 19:00 NEW MOON
11 21:54 Moon at Apogee: 406512 km
13 10:29 Moon at Ascending Node
13 17:59 Mercury 2.1°N of Moon
16 04:47 Mars 1.5°S of Moon
17 06 Mercury at Greatest Elong: 22.0°E
19 19:13 FIRST QUARTER
26 01:52 Moon at Perigee: 357310 km
26 11:14 FULL MOON
26 11:19 Total Lunar Eclipse; mag=1.006
26 19:38 Moon at Descending Node
29 03 Mercury-Venus: 0.4°
31 01:22 Saturn 4.2°N of Moon
31 11:41 Mars-Pollux: 5.2°S
Jun 01 08:57 Jupiter 4.6°N of Moon
02 07:24 LAST QUARTER
08 02:27 Moon at Apogee: 406230 km
09 16:42 Moon at Ascending Node
10 10:43 Annular Solar Eclipse; mag=0.943
10 10:53 NEW MOON
11 01 Mercury at Inferior Conjunction
12 06:44 Venus 1.5°S of Moon
12 13 Venus at Perihelion
13 19:52 Mars 2.8°S of Moon
18 03:54 FIRST QUARTER
21 03:32 Summer Solstice
21 15:57 Venus-Pollux: 5.1°S
22 20:36 Mercury-Aldebaran: 1.8°N
23 05:21 Mars-Beehive: 0.3°S
23 06:07 Moon at Descending Node
23 09:58 Moon at Perigee: 359960 km
24 18:40 FULL MOON
27 09:30 Saturn 4.0°N of Moon
28 18:38 Jupiter 4.5°N of Moon
|
Date GMT Event
(h:m)
Jul 01 21:11 LAST QUARTER
03 02:45 Venus-Beehive: 0.1°N
04 20 Mercury at Greatest Elong: 21.6°W
05 14:48 Moon at Apogee: 405342 km
06 02:59 Earth at Aphelion: 1.01673
06 22:41 Moon at Ascending Node
08 04:38 Mercury 3.7°S of Moon
10 01:17 NEW MOON
12 09:10 Venus 3.3°S of Moon
12 10:10 Mars 3.8°S of Moon
13 00 Mars at Aphelion
17 10:11 FIRST QUARTER
20 13:22 Moon at Descending Node
21 10:30 Moon at Perigee: 364520 km
21 21:21 Venus-Regulus: 1.0°N
24 01 Mercury at Perihelion
24 02:37 FULL MOON
24 16:42 Saturn 3.8°N of Moon
26 01:17 Jupiter 4.2°N of Moon
29 14:09 Mars-Regulus: 0.6°N
31 13:16 LAST QUARTER
Aug 01 14 Mercury at Superior Conjunction
02 05 Saturn at Opposition
02 07:35 Moon at Apogee: 404412 km
03 02:51 Moon at Ascending Node
08 13:50 NEW MOON
11 07:00 Venus 4.3°S of Moon
15 15:20 FIRST QUARTER
16 16:04 Moon at Descending Node
17 09:23 Moon at Perigee: 369127 km
19 03 Mercury-Mars: 0.1°
19 23 Jupiter at Opposition
20 22:19 Saturn 3.7°N of Moon
22 04:52 Jupiter 4.0°N of Moon
22 12:02 FULL MOON
30 02:22 Moon at Apogee: 404100 km
30 05:13 Moon at Ascending Node
30 07:13 LAST QUARTER
Sep 05 14:32 Venus-Spica: 1.4°N
06 00 Mercury at Aphelion
07 00:52 NEW MOON
10 02:09 Venus 4.1°S of Moon
11 10:05 Moon at Perigee: 368464 km
12 16:35 Moon at Descending Node
13 20:39 FIRST QUARTER
14 04 Mercury at Greatest Elong: 26.8°E
14 08 Neptune at Opposition
17 02:37 Saturn 3.8°N of Moon
18 06:50 Jupiter 4.0°N of Moon
20 23:55 FULL MOON
21 02:00 Mercury-Spica: 1.2°S
22 19:21 Autumnal Equinox
26 07:33 Moon at Ascending Node
26 21:44 Moon at Apogee: 404641 km
29 01:57 LAST QUARTER
Oct 02 22 Venus at Aphelion
06 11:05 NEW MOON
08 04 Mars-Sun Conjunction
08 17:28 Moon at Perigee: 363388 km
09 16 Mercury at Inferior Conjunction
09 18:36 Venus 2.9°S of Moon
09 19:35 Moon at Descending Node
13 03:25 FIRST QUARTER
14 07:12 Saturn 3.9°N of Moon
15 09:58 Jupiter 4.1°N of Moon
16 13:24 Venus-Antares: 1.4°N
20 00 Mercury at Perihelion
20 14:57 FULL MOON
23 11:47 Moon at Ascending Node
24 15:30 Moon at Apogee: 405616 km
25 05 Mercury at Greatest Elong: 18.4°W
28 20:05 LAST QUARTER
29 22 Venus at Greatest Elong: 47.0°E
Nov 02 01:18 Mercury-Spica: 3.7°N
04 21:15 NEW MOON
05 00 Uranus at Opposition
05 22:23 Moon at Perigee: 358845 km
06 03:38 Moon at Descending Node
08 05:21 Venus 1.1°S of Moon: Occn.
10 14:27 Saturn 4.1°N of Moon
11 12:46 FIRST QUARTER
11 17:13 Jupiter 4.4°N of Moon
19 08:58 FULL MOON
19 09:04 Partial Lunar Eclipse; mag=0.972
19 17:59 Moon at Ascending Node
21 02:14 Moon at Apogee: 406276 km
27 12:28 LAST QUARTER
29 05 Mercury at Superior Conjunction
Dec 03 14:58 Moon at Descending Node
04 07:35 Total Solar Eclipse; mag=1.036
04 07:43 NEW MOON
04 10:01 Moon at Perigee: 356794 km
07 00:48 Venus 1.9°N of Moon
08 01:52 Saturn 4.2°N of Moon
09 06:07 Jupiter 4.5°N of Moon
11 01:36 FIRST QUARTER
17 00:12 Moon at Ascending Node
18 02:16 Moon at Apogee: 406322 km
19 04:36 FULL MOON
21 15:59 Winter Solstice
27 02:24 LAST QUARTER
27 09:15 Mars-Antares: 4.4°N
29 05 Mercury-Venus: 4.2°
31 01:07 Moon at Descending Node
31 20:13 Mars 1.0°N of Moon: Occn.
|
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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.