This astronomy calendar of celestial events contains dates for notable celestial events including moon phases, meteor showers, eclipses, oppositions, conjunctions, and other interesting events.
Check out the archives to view previous years celesital events.
Celestial Events
January 2025
| Day | Time | Event |
|---|---|---|
| 3 | 6 – 9:30 pm | Quadrantid Meteor Shower peak |
| 3 | 6:30 pm – 1:15 pm | Conjunction of Venus-Moon-Saturn (6.5˚ apart) |
| 4 | 3:28 am | Perihelion (earth closest to sun) |
| 6 | 1:56 pm | First Quarter (Waxing Half) Moon |
| 7 | 1:34 pm | Moon at perigee (closest to earth) |
| 13 | 12:36 pm | Full Moon |
| 13 | 6:30 – 9:30 pm | Conjunction of Moon-Mars (1.5˚ apart) |
| 16 | 7:10:16 am | Latest sunrise ever occurs in Honolulu |
| 18 | 6:30 – 9:30 pm | Conjunction of Venus-Saturn (2˚ apart) |
| 19 | 6:15 – 9:30 pm | Venus at highest altitude in evening sky (44˚) |
| 20 | 6:55 pm | Moon at apogee (farthest from earth) |
| 21 | 10:30 am | Last Quarter (Waning Half) Moon |
| 23 | 6:30 pm – 6:30 am | Conjunction of Mars-Pollux (2.5˚ apart) |
| 29 | 2:35 am | New Moon |
| 31 | 6:45 – 7:30 pm | Conjunction of Moon-Saturn (1˚ apart) |
February 2025
| Day | Time | Event |
|---|---|---|
| 1 | 4:43 pm | Moon at perigee (closest to earth) |
| 1 | 6:30 – 9:30 pm | Conjunction of Moon-Venus (3.5˚ apart) |
| 4 | 10:02 pm | First Quarter (Waxing Half) Moon |
| 5 | 6:30 pm – 1:45 am | Conjunction of Moon-Pleiades (0.5˚ apart) |
| 6 | 6:30 – 9:30 pm | Conjunction of Moon-Jupiter-Aldebaran (6˚ apart) |
| 8 | 7:30 pm – 4:30 pm | Conjunction of Moon-Mars (5˚ apart) |
| 10 | 12:45:37 pm | Latest "noon"— latest time sun crosses the meridian in Honolulu (latest apparent noon) |
| 12 | 3:53 am | Full Moon |
| 17 | 3:11 pm | Moon at apogee (farthest from earth) |
| 20 | 7:32 am | Last Quarter (Waning Half) Moon |
| 27 | 2:44 pm | New Moon |
| 28 | 6:30 – 9:30 pm | Conjunction of Moon-Mercury (0.5˚ apart) |
March 2025
| Day | Time | Event |
|---|---|---|
| 1 | 11:18 am | Moon at perigee (closest to earth) |
| 5 | 6:45 pm – 1 am | Conjunction of Moon-Jupiter-Aldebaran (6˚ apart) |
| 6 | 6:31 am | First Quarter (Waxing Half) Moon |
| 7 | 6:45 – 7:45 pm | Mercury at highest altitude in evening sky (16˚) |
| 8 | 6:45 pm – 1 am | Conjunction of Moon-Mars (3˚ apart) |
| 9 | 2 am | Daylight Saving Time begins on mainland [Note: Hawaii does not observe DST] |
| 12 | sunrise (6:40:49 am) sunset (6:41:07 pm) |
Spring Equilux (equilux: equal day & night—12 hrs of daylight & 12 hrs of nightime) [actual difference between daylight and nightime = 36 sec] |
| 13 | 7:09 – 10:47 pm | Total LUNAR ECLIPSE partial begins 7:09 pm total begins: 8:26 pm max: 8:58 pm total ends: 9:31 pm partial ends: 10:47 pm |
| 13 | 8:45 pm | Full Moon |
| 17 | 6:37 am | Moon at apogee (farthest from earth) |
| 19 | 11:02 pm | Vernal Equinox (first day of spring) |
| 22 | 1:29 am | Last Quarter (Waning Half) Moon |
| 29 | 12:57 am | New Moon Super New Moon: largest new moon (occurs nearest perigee) |
| 29 | 7:26 pm | Moon at perigee (closest to earth) |
April 2025
| Day | Time | Event |
|---|---|---|
| 2 | 7 – 11:30 pm | Conjunction of Moon-Jupiter-Aldebaran (6˚ apart) |
| 4 | 4:14 pm | First Quarter (Waxing Half) Moon |
| 5 | 7 pm – 2 am | Conjunction of Moon-Mars (5˚ apart) |
| 10 | 7 am – 6 am | Conjunction of Venus-Mercury-Saturn (4˚ apart) |
| 12 | 2:22 pm | Full Moon Micro Full Moon: smallest full moon (occurs nearest apogee) |
| 13 | 12:48 pm | Moon at apogee (farthest from earth) |
| 20 | 3:35 pm | Last Quarter (Waning Half) Moon |
| 21 | 4:45 – 6 am | Mercury at highest altitude in morning sky (17˚) |
| 22 | midnight – 5:30 am | Lyrid Meteor Shower peak |
| 23 | 4 – 6 am | Venus at greatest brightness in morning sky (mag – 4.5) |
| 24 | 4:15 – 5:45 am | Conjunction of Venus-Moon-Saturn (5˚ apart) |
| 25 | 5 – 5:45 am | Conjunction of Moon-Mercury (4˚ apart) |
| 27 | 6:15 am | Moon at perigee (closest to earth) |
| 27 | 9:31 am | New Moon Super New Moon: largest new moon (occurs nearest perigee) |
| 28 | 4 – 5:45 am | Conjunction of Venus-Satrurn (3.5˚ apart) |
May 2025
| Day | Time | Event |
|---|---|---|
| 3 | 7 pm – 1 am | Conjunction of Moon-Mars (3˚ apart) |
| 4 | 3:51 am | First Quarter (Waxing Half) Moon |
| 6 | 2 – 5:30 am | Eta Aquarid Meteor Shower peak |
| 10 | 2:49 pm | Moon at apogee (farthest from earth) |
| 12 | 6:55 am | Full Moon Micro Full Moon: smallest full moon (occurs nearest apogee) |
| 18 | 12:17 pm | Hilo (kau ka lā i ka lolo = "Lāhaina Noon") |
| 18 | 12:21 pm | Kailua-Kona (kau ka lā i ka lolo = "Lāhaina Noon") |
| 20 | 1:58 am | Last Quarter (Waning Half) Moon |
| 22 | 2:45 – 5:30 am | Conjunction of Moon-Saturn (2˚ apart) |
| 23 | 12:21 pm | Hāna (kau ka lā i ka lolo = "Lāhaina Noon") |
| 23 | 3:30 – 5:30 am | Conjunction of Moon-Venus (3˚ apart) |
| 23 | 12:25 pm | Lāna‘i City (kau ka lā i ka lolo = "Lāhaina Noon") |
| 24 | 12:23 pm | Kahului (kau ka lā i ka lolo = "Lāhaina Noon") |
| 24 | 12:24 pm | Lāhaina (kau ka lā i ka lolo = "Lāhaina Noon") |
| 25 | 12:25 pm | Kaunakakai (kau ka lā i ka lolo = "Lāhaina Noon") |
| 25 | 3:37 pm | Moon at perigee (closest to earth) |
| 26 | 5:02 pm | New Moon |
| 27 | 12:28 pm | Honolulu (kau ka lā i ka lolo = "Lāhaina Noon") |
| 27 | 12:29 pm | Kāne‘ohe (kau ka lā i ka lolo = "Lāhaina Noon") |
| 30 | 12:35 pm | Līhue (kau ka lā i ka lolo = "Lāhaina Noon") |
| 31 | 7:30 – 11:45 pm | Conjunction of Moon-Mars (3˚ apart) |
June 2025
| Day | Time | Event |
|---|---|---|
| 2 | 5:40 pm | First Quarter (Waxing Half) Moon |
| 6 | 5:47:26 am | Earliest sunrise ever occurs in Honolulu |
| 7 | 12:42 am | Moon at apogee (farthest from earth) |
| 10 | 9:43 pm | Full Moon |
| 15 | 7:30 – 11:15 pm | Conjunction of Mars-Regulus (1˚ apart) |
| 18 | 1 – 5:45 am | Conjunction of Moon-Saturn (6˚ apart) |
| 18 | 9:19 am | Last Quarter (Waning Half) Moon |
| 20 | 4:42 pm | Summer Solstice (first day of summer) Honolulu sunrise 5:49:02 am; sunset 7:17:19 pm Longest Day: 13h 28m 17s |
| 22 | 6:43 pm | Moon at perigee (closest to earth) |
| 24 | 3:55 pm | Perigean Spring (King) Tides (2.64 ft) — Honolulu Harbor |
| 25 | 12:31 am | New Moon |
| 26 | 7:15 – 8:45 pm | Conjunction of Moon-Mercury (3˚ apart) |
| 29 | 7:15 – 8:45 pm | Mercury at highest altitude in evening sky (21˚) |
| 29 | 7:30 – 11:45 pm | Conjunction of Moon-Mars (0.5˚ apart) |
July 2025
| Day | Time | Event |
|---|---|---|
| 2 | 9:30 am | First Quarter (Waxing Half) Moon |
| 3 | 9:54 am | Aphelion (earth farthest from sun) |
| 4 | 4:29 pm | Moon at apogee (farthest from earth) |
| 4 | 7:18:54 pm | Latest sunset ever occurs in Honolulu |
| 5 | 3 – 5:45 am | Venus at highest altitude in morning sky (38˚) |
| 10 | 10:36 am | Full Moon |
| 11 | 12:43 pm | Līhue (kau ka lā i ka lolo = "Lāhaina Noon") |
| 13 | 3:15 – 5:45 am | Conjunction of Venus-Aldebaran (3˚ apart) |
| 15 | 12:37 pm | Kāne‘ohe (kau ka lā i ka lolo = "Lāhaina Noon") |
| 15 | 12:38 pm | Honolulu (kau ka lā i ka lolo = "Lāhaina Noon") |
| 15 | 11:15 pm – 5:30 am | Conjunction of Moon-Saturn (3.5˚ apart) |
| 16 | 12:35 pm | Kaunakakai (kau ka lā i ka lolo = "Lāhaina Noon") |
| 17 | 12:33 pm | Lāhaina (kau ka lā i ka lolo = "Lāhaina Noon") |
| 17 | 2:37 pm | Last Quarter (Waning Half) Moon |
| 18 | 12:32 pm | Kahului (kau ka lā i ka lolo = "Lāhaina Noon") |
| 18 | 12:34 pm | Lāna‘i City (kau kā la i ka lolo = "Lāhaina Noon") |
| 19 | 12:30 pm | Hāna (kau ka lā i ka lolo = "Lāhaina Noon") |
| 20 | 2 – 5:30 am | Conjunction of Moon-Pleiades (1.5˚ apart) |
| 20 | 3:52 am | Moon at perigee (closest to earth) |
| 23 | 3:40 pm | Perigean Spring (King) Tides (2.59 ft) — Honolulu Harbor |
| 24 | 9:11 am | New Moon |
| 24 | 12:27 pm | Hilo (kau ka lā i ka lolo = "Lāhaina Noon") |
| 24 | 12:31 pm | Kailua-Kona (kau ka lā i ka lolo = "Lāhaina Noon") |
| 28 | 7:15 – 9:45 pm | Conjunction of Moon-Mars (5˚ apart) |
| 29 | 9 pm – 5:30 am | Delta Aquariid Meteor Shower peak |
August 2025
| Day | Time | Event |
|---|---|---|
| 1 | 2:41 am | First Quarter (Waxing Half) Moon |
| 1 | 10:37 am | Moon at apogee (farthest from earth) |
| 8 | 9:55 pm | Full Moon |
| 11 | 3:30 – 6 am | Conjunction of Venus-Jupiter (1˚ apart) |
| 11 | 9:30 am – 6 am | Conjunction of Moon-Saturn (4˚ apart) |
| 12 | midnight – 5:45 am | Perseid Meteor Shower peak |
| 14 | 8:01 am | Moon at perigee (closest to earth) |
| 15 | 7:12 pm | Last Quarter (Waning Half) Moon |
| 16 | 12:15 – 5:30 am | Conjunction of Moon-Pleiades (0.5˚ apart) |
| 19 | 3:15 – 6 am | Conjunction of Moon-Jupiter (5˚ apart) |
| 19 | 4:45 – 6 am | Mercury at highest altitude in morning sky (18˚) |
| 21 | 5 – 6 am | Conjunction of Moon-Mercury (3.5˚ apart) |
| 22 | 8:06 pm | New Moon Black Moon: third New Moon in a season that has four New Moons |
| 25 | 7 – 8:15 pm | Conjunction of Moon-Mars (5˚ apart) |
| 29 | 5:34 am | Moon at apogee (farthest from earth) |
| 30 | 8:25 pm | First Quarter (Waxing Half) Moon |
| 31 | 1 – 5:45 pm | Aurigid Meteor Shower peak |
September 2025
| Day | Time | Event |
|---|---|---|
| 7 | 5:28 – 6:15 am | Penumbral LUNAR ECLIPSE begins: 5:38 am local max: 6:12 am ends: 6:15 am (moonset) |
| 7 | 8:08 am | Full Moon |
| 7 | 7:30 pm – 6 am | Conjunction of Moon-Saturn (4˚ apart) |
| 10 | 2:09 am | Moon at perigee (closest to earth) |
| 12 | 7 – 8 pm | Conjunction of Mars-Spica (2˚ apart) |
| 14 | 12:32 am | Last Quarter (Waning Half) Moon |
| 16 | 1:45 – 6 am | Conjunction of Moon-Jupiter (4˚ apart) |
| 18 | 4:30 – 6 am | Conjunction of Venus-Regulus (1˚ apart) |
| 19 | 4:45 – 6:15 am | Conjunction of Moon-Venus (2.5˚ apart) |
| 21 | 9:54 am | New Moon |
| 22 | 8:19 am | Autumnal Equinox (first day of Fall) |
| 23 | 6:30 – 7:30 pm | Conjunction of Moon-Mars (6˚ apart) |
| 25 | 11:46 pm | Moon at apogee (farthest from earth) |
| 29 | 1:53 pm | First Quarter (Waxing Half) Moon |
| 30 | sunrise (6:21:25 am) sunset (6:20:56 pm) |
Fall Equilux (equilux: equal day & night—12 hrs of daylight & 12 hrs of nightime) [actual difference between daylight and nightime = 58 sec] |
October 2025
| Day | Time | Event |
|---|---|---|
| 5 | 6:30 pm – 5:15 am | Conjunction of Moon-Saturn (4˚ apart) |
| 6 | 5:47 pm | Full Moon |
| 8 | 2:36 am | Moon at perigee (closest to earth) |
| 8 | 6 pm – 1 am | Draconid Meteor Shower peak |
| 13 | 8:12 am | Last Quarter (Waning Half) Moon |
| 13 | 12:15 – 6:15 am | Conjunction of Moon-Jupiter (6˚ apart) |
| 19 | 5:15 – 6 am | Conjunction of Venus-Moon (3˚ apart) |
| 19 | 6:15 – 7 pm | Conjunction of Mars-Mercury (2˚ apart) |
| 21 | 2:25 am | New Moon |
| 21 | 10:30 pm – 6 am | Orionid Meteor Shower peak |
| 23 | 1:31 pm | Moon at apogee (farthest from earth) |
| 23 | 6 – 7 pm | Conjunction of Mars-Mercury-Moon (3˚ apart) |
| 29 | 6:20 am | First Quarter (Waxing Half) Moon |
| 31 | 6 – 7 pm | Mercury at highest altitude in evening sky (14˚) |
November 2025
| Day | Time | Event |
|---|---|---|
| 1 | 6:30 am – 3:15 am | Conjunction of Moon-Saturn (3˚ apart) |
| 2 | 2 am | Daylight Saving Time ends on mainland [Hawaii does not observe DST] |
| 2 | 12:14:59 pm | Earliest "noon"—earliest time sun crosses the meridian in Honolulu (earliest apparent noon) |
| 5 | 3:19 am | Full Moon Super Full Moon: largest/brightest full moon (occurs nearest perigee) |
| 5 | 12:29 pm | Moon at perigee (closest to earth) |
| 6 | 3 – 6:15 am | Conjunction of Moon-Pleiades (1.5˚ apart) |
| 6 | 4:40 am | Perigean Spring (King) Tides (2.61 ft) — Honolulu Harbor |
| 7 | 5:28 am | Perigean Spring (King) Tides (2.61 ft) — Honolulu Harbor |
| 9 | 10:30 pm – 6:30 am | Conjunction of Moon-Jupiter (4˚ apart) |
| 11 | 7:28 pm | Last Quarter (Waning Half) Moon |
| 12 | 5:45 – 6:30 pm | Conjunction of Mars-Mercury (1˚ apart) |
| 12 | 6:30 pm – 6 am | North Taurid Meteor Shower peak |
| 17 | midnight – 6 am | Leonid Meteor Shower peak |
| 17 | 5:49 pm | Pleiades rise at sunset (first condition needed for declaring start of Makahiki; must wait until the sighting of first visible crescent moon after this date) |
| 19 | 4:48 pm | Moon at apogee (farthest from earth) |
| 19 | 8:47 pm | New Moon Micro New Moon: smallest new moon (occurs nearest apogee) |
| 20 | sunset | Beginning of Makahiki with sighting of first visible crescent moon (Hilo moon) after rise of Pleiades (this unofficially could be consider beginning of Makahiki; technically someone must visually sight the first crescent moon that occurs after the Mahakihi rise at sunset) |
| 26 | 5:49:25 pm | Earliest sunset ever occurs in Honolulu |
| 27 | 8:58 pm | First Quarter (Waxing Half) Moon |
| 29 | 6 pm – 1:30 am | Conjunction of Moon-Saturn (5˚ apart) |
December 2025
| Day | Time | Event |
|---|---|---|
| 4 | 1:06 am | Moon at perigee (closest to earth) |
| 4 | 1:14 pm | Full Moon Super Full Moon: largest/brightest full moon (occurs nearest perigee) |
| 5 | 4:28 am | Perigean Spring (King) Tides (2.70 ft) — Honolulu Harbor |
| 7 | 5:15 – 6:45 am | Mercury at highest altitude in morning sky (20˚) |
| 7 | 8:30 pm – 6:45 am | Conjunction of Moon-Jupiter (3.5˚ apart) |
| 11 | 10:51 am | Last Quarter (Waning Half) Moon |
| 14 | 7:30 pm – 6:30 am | Geminid Meteor Shower peak |
| 16 | 8:09 pm | Moon at apogee (farthest from earth) |
| 19 | 3:43 pm | New Moon |
| 21 | 5:03 am | Winter Solstice (first day of winter) Honolulu sunrise 7:03:32 am; sunset 5:56:08 pm Shortest Day: 10h 52m 36s |
| 22 | midnight – 6:30 am | Ursid Meteor Shower peak |
| 26 | 6:15 pm – 11:45 am | Conjunction of Moon-Saturn (3.5˚ apart) |
| 27 | 9:09 am | First Quarter (Waxing Half) Moon |
| 31 | 2 – 4:30 am | Conjunction of Moon-Pleiades (1˚ apart) |