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