2021Calendar of Astronomical Events
2021Phases of the Moon
Alaska Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Alaska Standard Time(Greenwich Mean Time - 9 hours).If Daylight Saving Time is in effect, add one hour to the times listed.
| 2021 Phases of the Moon | |||
| Alaska Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | - | Jan 6 00:37 |
| Jan 12 20:00 | Jan 20 12:02 | Jan 28 10:16 | Feb 4 08:37 |
| Feb 11 10:06 | Feb 19 09:47 | Feb 26 23:17 | Mar 5 16:30 |
| Mar 13 01:21 | Mar 21 05:40 | Mar 28 09:48 | Apr 4 01:02 |
| Apr 11 17:31 | Apr 19 21:59 | Apr 26 18:31 | May 3 10:50 |
| May 11 10:00 | May 19 10:13 | May 26 02:14 t | Jun 1 22:24 |
| Jun 10 01:53 A | Jun 17 18:54 | Jun 24 09:40 | Jul 1 12:11 |
| Jul 9 16:17 | Jul 17 01:11 | Jul 23 17:37 | Jul 31 04:16 |
| Aug 8 04:50 | Aug 15 06:20 | Aug 22 03:02 | Aug 29 22:13 |
| Sep 6 15:52 | Sep 13 11:39 | Sep 20 14:55 | Sep 28 16:57 |
| Oct 6 02:05 | Oct 12 18:25 | Oct 20 05:57 | Oct 28 11:05 |
| Nov 4 12:15 | Nov 11 03:46 | Nov 18 23:58 p | Nov 27 03:28 |
| Dec 3 22:43 T | Dec 10 16:36 | Dec 18 19:36 | Dec 26 17:24 |
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
Alaska Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Alaska Standard Time(Greenwich Mean Time - 9 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 | ||||||||
| Alaska Standard Time | ||||||||
| January - June | July - December | |||||||
Date AKST Even (h:m)Jan 02 05 Earth at Perihelion: 0.98325 AU 02 12:58 Regulus 4.7°S of Moon 03 06 Quadrantid Meteor Shower 06 00:37 LAST QUARTER MOON 09 06:39 Moon at Perigee: 367390 km 09 17:08 Antares 5.6°S of Moon 09 20 Mercury 1.6°S of Saturn 10 11:14 Moon at Descending Node 11 09 Mercury 1.4°S of Jupiter 11 11:12 Venus 1.5°N of Moon 12 20:00 NEW MOON 13 23:15 Mercury 2.3°N of Moon 20 12:02 FIRST QUARTER MOON 20 20:37 Mars 5.1°N of Moon 21 04:11 Moon at Apogee: 404361 km 23 17 Mercury at Greatest Elong: 18.6°E 23 17 Saturn in Conjunction with Sun 23 19:39 Aldebaran 4.7°S of Moon 24 12:47 Moon at Ascending Node 27 06:46 Pollux 3.8°N of Moon 28 05:50 Beehive 2.3°S of Moon 28 10:16 FULL MOON 28 16 Jupiter in Conjunction with Sun 28 17 Mercury at Perihelion 29 19:56 Regulus 4.6°S of MoonFeb 03 10:33 Moon at Perigee: 370127 km 04 08:37 LAST QUARTER MOON 05 23 Venus 0.4°S of Saturn 05 23:33 Antares 5.5°S of Moon 06 15:29 Moon at Descending Node 08 05 Mercury at Inferior Conjunction 11 05 Venus 0.4°S of Jupiter 11 10:06 NEW MOON 13 00 Mercury 4.6°N of Venus 15 05 Mercury 3.8°N of Jupiter 18 01:22 Moon at Apogee: 404467 km 18 13:47 Mars 3.7°N of Moon 19 09:47 FIRST QUARTER MOON 19 20 Venus at Aphelion 20 04:15 Aldebaran 5.0°S of Moon 20 16:44 Moon at Ascending Node 22 23 Mercury 4.0°N of Saturn 23 16:10 Pollux 3.7°N of Moon 24 15:16 Beehive 2.4°S of Moon 26 05:04 Regulus 4.6°S of Moon 26 23:17 FULL MOON Mar 01 20:19 Moon at Perigee: 365422 km 03 14:36 Mars 2.6°S of Pleiades 04 20 Mercury 0.3°N of Jupiter 05 04:58 Antares 5.2°S of Moon 05 15:56 Moon at Descending Node 05 16:30 LAST QUARTER MOON 06 02 Mercury at Greatest Elong: 27.3°W 09 14:02 Saturn 3.7°N of Moon 10 06:35 Jupiter 4.0°N of Moon 10 15 Neptune in Conjunction with Sun 10 16:02 Mercury 3.7°N of Moon 13 01:21 NEW MOON 13 17 Mercury at Aphelion 17 20:04 Moon at Apogee: 405253 km 19 08:48 Mars 1.9°N of Moon 19 12:13 Aldebaran 5.2°S of Moon 19 18:31 Moon at Ascending Node 20 00:37 Vernal Equinox 20 10:15 Mars 6.9°N of Aldebaran 21 05:40 FIRST QUARTER MOON 23 01:26 Pollux 3.5°N of Moon 24 00:58 Beehive 2.6°S of Moon 25 15:17 Regulus 4.7°S of Moon 25 21 Venus at Superior Conjunction 28 09:48 FULL MOON 29 06:52 Spica 6.5°S of Moon 29 21:12 Moon at Perigee: 360311 kmApr 01 11:49 Antares 4.9°S of Moon 01 17:41 Moon at Descending Node 04 01:02 LAST QUARTER MOON 05 23:34 Saturn 4.0°N of Moon 06 22:15 Jupiter 4.4°N of Moon 11 17:31 NEW MOON 14 08:47 Moon at Apogee: 406120 km 15 19:07 Aldebaran 5.4°S of Moon 15 20:53 Moon at Ascending Node 17 03:09 Mars 0.1°N of Moon: Occn. 18 17 Mercury at Superior Conjunction 19 09:18 Pollux 3.2°N of Moon 19 21:59 FIRST QUARTER MOON 20 09:25 Beehive 2.8°S of Moon 22 00:48 Regulus 4.9°S of Moon 22 03 Lyrid Meteor Shower 25 17:43 Spica 6.5°S of Moon 26 16 Mercury at Perihelion 26 18:31 FULL MOON 27 06:24 Moon at Perigee: 357379 km 28 21:07 Antares 4.8°S of Moon 29 00:17 Moon at Descending Node 30 12 Uranus in Conjunction with Sun May 03 08:02 Saturn 4.2°N of Moon 03 10:50 LAST QUARTER MOON 03 18:03 Mercury 2.1°S of Pleiades 04 12:00 Jupiter 4.6°N of Moon 04 16 Eta-Aquarid Meteor Shower 11 10:00 NEW MOON 11 12:54 Moon at Apogee: 406512 km 13 01:29 Moon at Ascending Node 13 08:59 Mercury 2.1°N of Moon 15 19:47 Mars 1.5°S of Moon 16 15:39 Pollux 3.1°N of Moon 16 21 Mercury at Greatest Elong: 22.0°E 17 16:08 Beehive 2.9°S of Moon 19 08:28 Regulus 5.0°S of Moon 19 10:13 FIRST QUARTER MOON 23 04:07 Spica 6.5°S of Moon 25 16:52 Moon at Perigee: 357310 km 26 02:14 FULL MOON 26 02:19 Total Lunar Eclipse; mag=1.009 26 07:55 Antares 4.8°S of Moon 26 10:38 Moon at Descending Node 28 18 Mercury 0.4°S of Venus 30 16:22 Saturn 4.2°N of Moon 31 02:41 Mars 5.2°S of Pollux 31 23:57 Jupiter 4.6°N of MoonJun 01 22:24 LAST QUARTER MOON 07 17:27 Moon at Apogee: 406230 km 09 07:42 Moon at Ascending Node 10 01:42 Annular Solar Eclipse; mag=0.943 10 01:53 NEW MOON 10 16 Mercury at Inferior Conjunction 11 21:44 Venus 1.5°S of Moon 12 04 Venus at Perihelion 12 21:19 Pollux 3.1°N of Moon 13 10:52 Mars 2.8°S of Moon 13 21:47 Beehive 2.9°S of Moon 15 14:28 Regulus 5.0°S of Moon 17 18:54 FIRST QUARTER MOON 20 18:32 Summer Solstice 21 06:57 Venus 5.1°S of Pollux 22 11:36 Mercury 1.8°N of Aldebaran 22 18:26 Antares 4.8°S of Moon 22 20:21 Mars 0.3°S of Beehive 22 21:07 Moon at Descending Node 23 00:58 Moon at Perigee: 359960 km 24 09:40 FULL MOON 27 00:30 Saturn 4.0°N of Moon 28 09:38 Jupiter 4.5°N of Moon | Date AKST Even (h:m)Jul 01 12:11 LAST QUARTER MOON 02 17:45 Venus 0.1°N of Beehive 04 11 Mercury at Greatest Elong: 21.6°W 05 05:48 Moon at Apogee: 405342 km 05 14 Earth at Aphelion: 1.01673 AU 06 13:41 Moon at Ascending Node 06 13:52 Aldebaran 5.5°S of Moon 07 19:38 Mercury 3.7°S of Moon 09 16:17 NEW MOON 12 00:10 Venus 3.3°S of Moon 12 01:10 Mars 3.8°S of Moon 12 15 Mars at Aphelion: 1.66596 AU 12 20:02 Regulus 4.9°S of Moon 13 04 Venus 0.5°N of Mars 16 19:01 Spica 6.4°S of Moon 17 01:11 FIRST QUARTER MOON 20 03:06 Antares 4.7°S of Moon 20 04:22 Moon at Descending Node 21 01:30 Moon at Perigee: 364520 km 21 12:21 Venus 1.0°N of Regulus 23 16 Mercury at Perihelion 23 17:37 FULL MOON 24 07:42 Saturn 3.8°N of Moon 25 16:17 Jupiter 4.2°N of Moon 27 18 Delta-Aquarid Meteor Shower 29 05:09 Mars 0.6°N of Regulus 31 04:16 LAST QUARTER MOON Aug 01 05 Mercury at Superior Conjunction 01 20 Saturn at Opposition 01 22:35 Moon at Apogee: 404412 km 02 17:51 Moon at Ascending Node 02 21:18 Aldebaran 5.7°S of Moon 06 10:42 Pollux 3.1°N of Moon 08 04:50 NEW MOON 10 22:00 Venus 4.3°S of Moon 12 10 Perseid Meteor Shower 13 00:31 Spica 6.1°S of Moon 15 06:20 FIRST QUARTER MOON 16 07:04 Moon at Descending Node 16 09:34 Antares 4.5°S of Moon 17 00:23 Moon at Perigee: 369127 km 18 18 Mercury 0.1°S of Mars 19 14 Jupiter at Opposition 20 13:19 Saturn 3.7°N of Moon 21 19:52 Jupiter 4.0°N of Moon 22 03:02 FULL MOON 29 17:22 Moon at Apogee: 404100 km 29 20:13 Moon at Ascending Node 29 22:13 LAST QUARTER MOON Sep 02 19:04 Pollux 3.0°N of Moon 03 19:07 Beehive 2.9°S of Moon 05 05:32 Venus 1.4°N of Spica 05 15 Mercury at Aphelion 06 15:52 NEW MOON 09 07:01 Spica 5.9°S of Moon 09 17:09 Venus 4.1°S of Moon 11 01:05 Moon at Perigee: 368464 km 12 07:35 Moon at Descending Node 12 14:59 Antares 4.2°S of Moon 13 11:39 FIRST QUARTER MOON 13 19 Mercury at Greatest Elong: 26.8°E 13 23 Neptune at Opposition 16 17:37 Saturn 3.8°N of Moon 17 21:50 Jupiter 4.0°N of Moon 20 14:55 FULL MOON 20 17:00 Mercury 1.2°S of Spica 22 10:21 Autumnal Equinox 25 22:33 Moon at Ascending Node 26 12:44 Moon at Apogee: 404641 km 28 16:57 LAST QUARTER MOON 30 03:44 Pollux 2.8°N of MoonOct 01 04:07 Beehive 3.1°S of Moon 02 13 Venus at Aphelion 02 20:12 Regulus 4.9°S of Moon 06 02:05 NEW MOON 07 19 Mars in Conjunction with Sun 08 08:28 Moon at Perigee: 363388 km 09 07 Mercury at Inferior Conjunction 09 09:36 Venus 2.9°S of Moon 09 10:35 Moon at Descending Node 09 21:27 Antares 4.0°S of Moon 12 18:25 FIRST QUARTER MOON 13 22:12 Saturn 3.9°N of Moon 15 00:58 Jupiter 4.1°N of Moon 16 04:24 Venus 1.4°N of Antares 19 15 Mercury at Perihelion 20 05:57 FULL MOON 21 02 Orionid Meteor Shower 23 02:47 Moon at Ascending Node 24 06:30 Moon at Apogee: 405616 km 24 20 Mercury at Greatest Elong: 18.4°W 27 11:40 Pollux 2.6°N of Moon 28 11:05 LAST QUARTER MOON 28 12:32 Beehive 3.3°S of Moon 29 13 Venus at Greatest Elong: 47.0°E 30 05:33 Regulus 5.1°S of MoonNov 01 16:18 Mercury 3.7°N of Spica 03 09:40 Mercury 1.2°S of Moon: Occn. 04 12:15 NEW MOON 04 15 Uranus at Opposition 05 03 S Taurid Meteor Shower 05 13:23 Moon at Perigee: 358845 km 05 18:38 Moon at Descending Node 06 06:29 Antares 3.9°S of Moon 07 20:21 Venus 1.1°S of Moon: Occn. 10 05:27 Saturn 4.1°N of Moon 10 06 Mercury 1.0°N of Mars 11 03:46 FIRST QUARTER MOON 11 08:13 Jupiter 4.4°N of Moon 12 02 N Taurid Meteor Shower 17 09 Leonid Meteor Shower 18 23:58 FULL MOON 19 00:03 Partial Lunar Eclipse; mag=0.974 19 08:59 Moon at Ascending Node 20 17:14 Moon at Apogee: 406276 km 23 18:22 Pollux 2.5°N of Moon 24 19:32 Beehive 3.3°S of Moon 26 13:27 Regulus 5.2°S of Moon 27 03:28 LAST QUARTER MOON 28 20 Mercury at Superior Conjunction 30 13:04 Spica 5.9°S of MoonDec 03 05:58 Moon at Descending Node 03 22:33 Total Solar Eclipse; mag=1.037 03 22:43 NEW MOON 04 01:01 Moon at Perigee: 356794 km 06 15:48 Venus 1.9°N of Moon 07 16:52 Saturn 4.2°N of Moon 08 21:07 Jupiter 4.5°N of Moon 10 16:36 FIRST QUARTER MOON 13 22 Geminid Meteor Shower 16 15:12 Moon at Ascending Node 17 17:16 Moon at Apogee: 406322 km 18 19:36 FULL MOON 21 00:20 Pollux 2.6°N of Moon 21 06:59 Winter Solstice 22 01:28 Beehive 3.3°S of Moon 22 06 Ursid Meteor Shower 23 19:40 Regulus 5.1°S of Moon 26 17:24 LAST QUARTER MOON 27 00:15 Mars 4.4°N of Antares 27 21:58 Spica 5.8°S of Moon 28 20 Mercury 4.2°S of Venus 30 16:07 Moon at Descending Node 31 04:54 Antares 3.9°S of Moon 31 11:13 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.