2021Calendar of Astronomical Events
2021Phases of the Moon
Atlantic Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Atlantic Standard Time(Greenwich Mean Time - 4 hours).If Daylight Saving Time is in effect, add one hour to the times listed.
| 2021 Phases of the Moon | |||
| Atlantic Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | - | Jan 6 05:37 |
| Jan 13 01:00 | Jan 20 17:02 | Jan 28 15:16 | Feb 4 13:37 |
| Feb 11 15:06 | Feb 19 14:47 | Feb 27 04:17 | Mar 5 21:30 |
| Mar 13 06:21 | Mar 21 10:40 | Mar 28 14:48 | Apr 4 06:02 |
| Apr 11 22:31 | Apr 20 02:59 | Apr 26 23:31 | May 3 15:50 |
| May 11 15:00 | May 19 15:13 | May 26 07:14 t | Jun 2 03:24 |
| Jun 10 06:53 A | Jun 17 23:54 | Jun 24 14:40 | Jul 1 17:11 |
| Jul 9 21:17 | Jul 17 06:11 | Jul 23 22:37 | Jul 31 09:16 |
| Aug 8 09:50 | Aug 15 11:20 | Aug 22 08:02 | Aug 30 03:13 |
| Sep 6 20:52 | Sep 13 16:39 | Sep 20 19:55 | Sep 28 21:57 |
| Oct 6 07:05 | Oct 12 23:25 | Oct 20 10:57 | Oct 28 16:05 |
| Nov 4 17:15 | Nov 11 08:46 | Nov 19 04:58 p | Nov 27 08:28 |
| Dec 4 03:43 T | Dec 10 21:36 | Dec 19 00:36 | Dec 26 22:24 |
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.
2021Calendar of Astronomical Events
Atlantic Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Atlantic Standard Time(Greenwich Mean Time - 4 hours).If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.
| 2021Calendar of Astronomical Events | ||||||||
| Atlantic Standard Time | ||||||||
| January - June | July - December | |||||||
Date AST Event (h:m)Jan 01 03:05 Beehive 2.3°S of Moon 02 10 Earth at Perihelion: 0.98325 AU 02 17:58 Regulus 4.7°S of Moon 03 11 Quadrantid Meteor Shower 06 05:37 LAST QUARTER MOON 09 11:39 Moon at Perigee: 367390 km 09 22:08 Antares 5.6°S of Moon 10 01 Mercury 1.6°S of Saturn 10 16:14 Moon at Descending Node 11 14 Mercury 1.4°S of Jupiter 11 16:12 Venus 1.5°N of Moon 13 01:00 NEW MOON 14 04:15 Mercury 2.3°N of Moon 20 17:02 FIRST QUARTER MOON 21 01:37 Mars 5.1°N of Moon 21 09:11 Moon at Apogee: 404361 km 23 22 Mercury at Greatest Elong: 18.6°E 23 22 Saturn in Conjunction with Sun 24 00:39 Aldebaran 4.7°S of Moon 24 17:47 Moon at Ascending Node 27 11:46 Pollux 3.8°N of Moon 28 10:50 Beehive 2.3°S of Moon 28 15:16 FULL MOON 28 21 Jupiter in Conjunction with Sun 28 22 Mercury at Perihelion 30 00:56 Regulus 4.6°S of MoonFeb 03 15:33 Moon at Perigee: 370127 km 04 13:37 LAST QUARTER MOON 06 04 Venus 0.4°S of Saturn 06 04:33 Antares 5.5°S of Moon 06 20:29 Moon at Descending Node 08 10 Mercury at Inferior Conjunction 11 10 Venus 0.4°S of Jupiter 11 15:06 NEW MOON 13 05 Mercury 4.6°N of Venus 15 10 Mercury 3.8°N of Jupiter 18 06:22 Moon at Apogee: 404467 km 18 18:47 Mars 3.7°N of Moon 19 14:47 FIRST QUARTER MOON 20 01 Venus at Aphelion 20 09:15 Aldebaran 5.0°S of Moon 20 21:44 Moon at Ascending Node 23 04 Mercury 4.0°N of Saturn 23 21:10 Pollux 3.7°N of Moon 24 20:16 Beehive 2.4°S of Moon 26 10:04 Regulus 4.6°S of Moon 27 04:17 FULL MOON Mar 02 01:19 Moon at Perigee: 365422 km 03 19:36 Mars 2.6°S of Pleiades 05 01 Mercury 0.3°N of Jupiter 05 09:58 Antares 5.2°S of Moon 05 20:56 Moon at Descending Node 05 21:30 LAST QUARTER MOON 06 07 Mercury at Greatest Elong: 27.3°W 09 19:02 Saturn 3.7°N of Moon 10 11:35 Jupiter 4.0°N of Moon 10 20 Neptune in Conjunction with Sun 10 21:02 Mercury 3.7°N of Moon 13 06:21 NEW MOON 13 22 Mercury at Aphelion 18 01:04 Moon at Apogee: 405253 km 19 13:48 Mars 1.9°N of Moon 19 17:13 Aldebaran 5.2°S of Moon 19 23:31 Moon at Ascending Node 20 05:37 Vernal Equinox 20 15:15 Mars 6.9°N of Aldebaran 21 10:40 FIRST QUARTER MOON 23 06:26 Pollux 3.5°N of Moon 24 05:58 Beehive 2.6°S of Moon 25 20:17 Regulus 4.7°S of Moon 26 02 Venus at Superior Conjunction 28 14:48 FULL MOON 29 11:52 Spica 6.5°S of Moon 30 02:12 Moon at Perigee: 360311 kmApr 01 16:49 Antares 4.9°S of Moon 01 22:41 Moon at Descending Node 04 06:02 LAST QUARTER MOON 06 04:34 Saturn 4.0°N of Moon 07 03:15 Jupiter 4.4°N of Moon 11 22:31 NEW MOON 14 13:47 Moon at Apogee: 406120 km 16 00:07 Aldebaran 5.4°S of Moon 16 01:53 Moon at Ascending Node 17 08:09 Mars 0.1°N of Moon: Occn. 18 22 Mercury at Superior Conjunction 19 14:18 Pollux 3.2°N of Moon 20 02:59 FIRST QUARTER MOON 20 14:25 Beehive 2.8°S of Moon 22 05:48 Regulus 4.9°S of Moon 22 08 Lyrid Meteor Shower 25 22:43 Spica 6.5°S of Moon 26 21 Mercury at Perihelion 26 23:31 FULL MOON 27 11:24 Moon at Perigee: 357379 km 29 02:07 Antares 4.8°S of Moon 29 05:17 Moon at Descending Node 30 17 Uranus in Conjunction with Sun May 03 13:02 Saturn 4.2°N of Moon 03 15:50 LAST QUARTER MOON 03 23:03 Mercury 2.1°S of Pleiades 04 17:00 Jupiter 4.6°N of Moon 04 21 Eta-Aquarid Meteor Shower 11 15:00 NEW MOON 11 17:54 Moon at Apogee: 406512 km 13 06:29 Moon at Ascending Node 13 13:59 Mercury 2.1°N of Moon 16 00:47 Mars 1.5°S of Moon 16 20:39 Pollux 3.1°N of Moon 17 02 Mercury at Greatest Elong: 22.0°E 17 21:08 Beehive 2.9°S of Moon 19 13:28 Regulus 5.0°S of Moon 19 15:13 FIRST QUARTER MOON 23 09:07 Spica 6.5°S of Moon 25 21:52 Moon at Perigee: 357310 km 26 07:14 FULL MOON 26 07:19 Total Lunar Eclipse; mag=1.009 26 12:55 Antares 4.8°S of Moon 26 15:38 Moon at Descending Node 28 23 Mercury 0.4°S of Venus 30 21:22 Saturn 4.2°N of Moon 31 07:41 Mars 5.2°S of PolluxJun 01 04:57 Jupiter 4.6°N of Moon 02 03:24 LAST QUARTER MOON 07 22:27 Moon at Apogee: 406230 km 09 12:42 Moon at Ascending Node 10 06:42 Annular Solar Eclipse; mag=0.943 10 06:53 NEW MOON 10 21 Mercury at Inferior Conjunction 12 02:44 Venus 1.5°S of Moon 12 09 Venus at Perihelion 13 02:19 Pollux 3.1°N of Moon 13 15:52 Mars 2.8°S of Moon 14 02:47 Beehive 2.9°S of Moon 15 19:28 Regulus 5.0°S of Moon 17 23:54 FIRST QUARTER MOON 20 23:32 Summer Solstice 21 11:57 Venus 5.1°S of Pollux 22 16:36 Mercury 1.8°N of Aldebaran 22 23:26 Antares 4.8°S of Moon 23 01:21 Mars 0.3°S of Beehive 23 02:07 Moon at Descending Node 23 05:58 Moon at Perigee: 359960 km 24 14:40 FULL MOON 27 05:30 Saturn 4.0°N of Moon 28 14:38 Jupiter 4.5°N of Moon | Date AST Event (h:m)Jul 01 17:11 LAST QUARTER MOON 02 22:45 Venus 0.1°N of Beehive 04 16 Mercury at Greatest Elong: 21.6°W 05 10:48 Moon at Apogee: 405342 km 05 19 Earth at Aphelion: 1.01673 AU 06 18:41 Moon at Ascending Node 06 18:52 Aldebaran 5.5°S of Moon 08 00:38 Mercury 3.7°S of Moon 09 21:17 NEW MOON 12 05:10 Venus 3.3°S of Moon 12 06:10 Mars 3.8°S of Moon 12 20 Mars at Aphelion: 1.66596 AU 13 01:02 Regulus 4.9°S of Moon 13 09 Venus 0.5°N of Mars 17 00:01 Spica 6.4°S of Moon 17 06:11 FIRST QUARTER MOON 20 08:06 Antares 4.7°S of Moon 20 09:22 Moon at Descending Node 21 06:30 Moon at Perigee: 364520 km 21 17:21 Venus 1.0°N of Regulus 23 21 Mercury at Perihelion 23 22:37 FULL MOON 24 12:42 Saturn 3.8°N of Moon 25 21:17 Jupiter 4.2°N of Moon 27 23 Delta-Aquarid Meteor Shower 29 10:09 Mars 0.6°N of Regulus 31 09:16 LAST QUARTER MOON Aug 01 10 Mercury at Superior Conjunction 02 01 Saturn at Opposition 02 03:35 Moon at Apogee: 404412 km 02 22:51 Moon at Ascending Node 03 02:18 Aldebaran 5.7°S of Moon 06 15:42 Pollux 3.1°N of Moon 08 09:50 NEW MOON 11 03:00 Venus 4.3°S of Moon 12 15 Perseid Meteor Shower 13 05:31 Spica 6.1°S of Moon 15 11:20 FIRST QUARTER MOON 16 12:04 Moon at Descending Node 16 14:34 Antares 4.5°S of Moon 17 05:23 Moon at Perigee: 369127 km 18 23 Mercury 0.1°S of Mars 19 19 Jupiter at Opposition 20 18:19 Saturn 3.7°N of Moon 22 00:52 Jupiter 4.0°N of Moon 22 08:02 FULL MOON 29 22:22 Moon at Apogee: 404100 km 30 01:13 Moon at Ascending Node 30 03:13 LAST QUARTER MOON Sep 03 00:04 Pollux 3.0°N of Moon 04 00:07 Beehive 2.9°S of Moon 05 10:32 Venus 1.4°N of Spica 05 20 Mercury at Aphelion 06 20:52 NEW MOON 09 12:01 Spica 5.9°S of Moon 09 22:09 Venus 4.1°S of Moon 11 06:05 Moon at Perigee: 368464 km 12 12:35 Moon at Descending Node 12 19:59 Antares 4.2°S of Moon 13 16:39 FIRST QUARTER MOON 14 00 Mercury at Greatest Elong: 26.8°E 14 04 Neptune at Opposition 16 22:37 Saturn 3.8°N of Moon 18 02:50 Jupiter 4.0°N of Moon 20 19:55 FULL MOON 20 22:00 Mercury 1.2°S of Spica 22 15:21 Autumnal Equinox 26 03:33 Moon at Ascending Node 26 17:44 Moon at Apogee: 404641 km 28 21:57 LAST QUARTER MOON 30 08:44 Pollux 2.8°N of MoonOct 01 09:07 Beehive 3.1°S of Moon 02 18 Venus at Aphelion 03 01:12 Regulus 4.9°S of Moon 06 07:05 NEW MOON 08 00 Mars in Conjunction with Sun 08 13:28 Moon at Perigee: 363388 km 09 12 Mercury at Inferior Conjunction 09 14:36 Venus 2.9°S of Moon 09 15:35 Moon at Descending Node 10 02:27 Antares 4.0°S of Moon 12 23:25 FIRST QUARTER MOON 14 03:12 Saturn 3.9°N of Moon 15 05:58 Jupiter 4.1°N of Moon 16 09:24 Venus 1.4°N of Antares 19 20 Mercury at Perihelion 20 10:57 FULL MOON 21 07 Orionid Meteor Shower 23 07:47 Moon at Ascending Node 24 11:30 Moon at Apogee: 405616 km 25 01 Mercury at Greatest Elong: 18.4°W 27 16:40 Pollux 2.6°N of Moon 28 16:05 LAST QUARTER MOON 28 17:32 Beehive 3.3°S of Moon 29 18 Venus at Greatest Elong: 47.0°E 30 10:33 Regulus 5.1°S of MoonNov 01 21:18 Mercury 3.7°N of Spica 03 14:40 Mercury 1.2°S of Moon: Occn. 04 17:15 NEW MOON 04 20 Uranus at Opposition 05 08 S Taurid Meteor Shower 05 18:23 Moon at Perigee: 358845 km 05 23:38 Moon at Descending Node 06 11:29 Antares 3.9°S of Moon 08 01:21 Venus 1.1°S of Moon: Occn. 10 10:27 Saturn 4.1°N of Moon 10 11 Mercury 1.0°N of Mars 11 08:46 FIRST QUARTER MOON 11 13:13 Jupiter 4.4°N of Moon 12 07 N Taurid Meteor Shower 17 14 Leonid Meteor Shower 19 04:58 FULL MOON 19 05:03 Partial Lunar Eclipse; mag=0.974 19 13:59 Moon at Ascending Node 20 22:14 Moon at Apogee: 406276 km 23 23:22 Pollux 2.5°N of Moon 25 00:32 Beehive 3.3°S of Moon 26 18:27 Regulus 5.2°S of Moon 27 08:28 LAST QUARTER MOON 29 01 Mercury at Superior Conjunction 30 18:04 Spica 5.9°S of MoonDec 03 10:58 Moon at Descending Node 04 03:33 Total Solar Eclipse; mag=1.037 04 03:43 NEW MOON 04 06:01 Moon at Perigee: 356794 km 06 20:48 Venus 1.9°N of Moon 07 21:52 Saturn 4.2°N of Moon 09 02:07 Jupiter 4.5°N of Moon 10 21:36 FIRST QUARTER MOON 14 03 Geminid Meteor Shower 16 20:12 Moon at Ascending Node 17 22:16 Moon at Apogee: 406322 km 19 00:36 FULL MOON 21 05:20 Pollux 2.6°N of Moon 21 11:59 Winter Solstice 22 06:28 Beehive 3.3°S of Moon 22 11 Ursid Meteor Shower 24 00:40 Regulus 5.1°S of Moon 26 22:24 LAST QUARTER MOON 27 05:15 Mars 4.4°N of Antares 28 02:58 Spica 5.8°S of Moon 29 01 Mercury 4.2°S of Venus 30 21:07 Moon at Descending Node 31 09:54 Antares 3.9°S of Moon 31 16:13 Mars 1.0°N of Moon: Occn. | |||||||
Terms Used in Astronomical Events Calendar
- Perihelion - instant when a planet is closest to the Sun
- Aphelion - instant when a planet is furthest from the Sun
- Perigee - instant when the Moon is closest to Earth
- Apogee - instant when the Moon is furthest from Earth
- Inferior Conjunction - instant when a planet (Mercury or Venus) passes between Earth and the Sun
- Superior Conjunction - instant when a planet (Mercury or Venus) passes on the opposite side of the Sun from Earth
- Greatest Elongation - the maximum angular separation between the Sun and the planet (Mercury or Venus) 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 - instant when a planet appears opposite the Sun as seen from Earth
- Conjunction - instant when a planet appears closest the Sun as seen from Earth
- Occultation - the Moon occults or eclipses a star or planet
- Ascending Node - point where the Moon crosses from the southern to northern portion of its orbit
- Descending Node - point where the Moon crosses from the northern to the southern portion of its orbit
- Aldebaran - bright star in the constellation Taurus
- Pollux - bright star in the constellation Gemini
- Regulus - bright star in the constellation Leo
- Spica - bright star in the constellation Virgo
- Antares - bright star in the constellation Scorpius
- Pleiades - bright star cluster in the constellation Taurus
- Beehive - bright star cluster in the constellation Cancer
Calendars of Astronomical Events: 2021 to 2030
The Americas
Below are links to calendars of astronomical events from 2021 to 2030 for seven time zones in the Americas.
Choose a time zone and click on a year to get a calendar of astronomical events for that year.
| Calendars of Astronomical Events - The Americas | |||||||||||||||
| AST | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | |||||
| EST | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | |||||
| CST | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | |||||
| MST | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | |||||
| PST | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | |||||
| AKST | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | |||||
| HST | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | |||||
- AST = Atlantic Standard Time (= GMT - 4 hours)
- EST = Eastern Standard Time (= GMT - 5 hours)
- CST = Central Standard Time (= GMT - 6 hours)
- MST = Mountain Standard Time (= GMT - 7 hours)
- PST = Pacific Standard Time (= GMT - 8 hours)
- AKST = Alaskan Standard Time (= GMT - 9 hours)
- HST = Hawaiian Standard Time (= GMT - 10 hours)
(where GMT = Greenwich Mean Time)
- Time Zones Abbreviations
A time zone may have a different name in different countries. Note the difference in hours between a given time zone and Greenwich Mean Time to help in identification.
For other years and other time zones, visit: Calendars of Astronomical Events.