2021Calendar of Astronomical Events

    

2021Phases of the Moon

Gulf Standard Time

The following table gives the date and time of the Moon's phases for the year. The times listed are for Gulf 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
Gulf Standard Time
New Moon First Quarter Full Moon Last Quarter
--- Jan 6 13:37
Jan 13 09:00 Jan 21 01:02 Jan 28 23:16 Feb 4 21:37
Feb 11 23:06 Feb 19 22:47 Feb 27 12:17 Mar 6 05:30
Mar 13 14:21 Mar 21 18:40 Mar 28 22:48 Apr 4 14:02
Apr 12 06:31 Apr 20 10:59 Apr 27 07:31 May 3 23:50
May 11 23:00 May 19 23:13 May 26 15:14 t Jun 2 11:24
Jun 10 14:53 A Jun 18 07:54 Jun 24 22:40 Jul 2 01:11
Jul 10 05:17 Jul 17 14:11 Jul 24 06:37 Jul 31 17:16
Aug 8 17:50 Aug 15 19:20 Aug 22 16:02 Aug 30 11:13
Sep 7 04:52 Sep 14 00:39 Sep 21 03:55 Sep 29 05:57
Oct 6 15:05 Oct 13 07:25 Oct 20 18:57 Oct 29 00:05
Nov 5 01:15 Nov 11 16:46 Nov 19 12:58 p Nov 27 16:28
Dec 4 11:43 T Dec 11 05:36 Dec 19 08:36 Dec 27 06:24

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

Gulf Standard Time

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

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

Europe, Africa, and the Middle East

Below are links to calendars of astronomical events from 2021 to 2030 for five time zones
in Europe, Africa, and the Middle East.
Choose a time zone and click on a year to get a calendar of astronomical events for that year.

Calendar of Astronomical Events - Europe, Africa, & Middle East
GMT 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
CET 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
EET 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
MSK 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
GST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030

        Time Zones Abbreviations
        • GMT = Greenwich Mean Time
        • CET = Central European Time (= GMT + 1 hour)
        • EET = Eastern European Time (= GMT + 2 hours)
        • MSK = Moscow Time (= GMT + 3 hours)
        • GST = Gulf Standard Time (= GMT + 4 hours)

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.

Accuracy of the Astronomical Events Calendars

The goal of the Astronomical Events Calendars is to present a wide range of solar system phenomena with reasonable accuracy. In general, events listed to the nearest hour are accurate to ± 30 minutes.Events listed with a precision in hours and minutes (i.e., hh:mm) are typically accurate to ± 5 minutes or less.

The following table gives a more detailed breakdown of the accuracy of times for various astronomical events.

Accuracy of the Astronomical Events Calendars
Solstice/Equinox (Earth) ± 0.5 minute
Aphelion/Perihelion (Earth) ± 30 minutes; ± 0.00001 AU
Solar and Lunar Eclipses ± 0.5 minute
Phases of the Moon ± 0.5 minute
Moon at Nodes ± 2 minutes
Apogee/Perigee of Moon ± 5 minutes; ± 5 kilometers
Conjunctions of Moon with Star or Planet ± 10 minutes
Conjunctions of Planet with Planet ± 3 hours
Inferior/Superior Conjunctions (Mercury & Venus) ± 30 minutes
Greatest Elongation (Mercury & Venus) ± 30 minutes
Opposition/Conjunction (Outer Planets) ± 3 hours
Aphelion/Perihelion of Planets ± 30 minutes

Acknowledgements

All calculations are by Fred Espenak and he assumes full responsibility for their accuracy. Algorithms used in predicting many of the astronomical events are based on Astronomical Algorithms by Jean Meeus (Willmann-Bell Inc. Richmond 1998).

Permission is freely granted to reproduce this data when accompanied by the acknowledgment:


Return to: Calendars of Astronomical Events

Return to: Planetary Ephemeris Data