The four astronomical seasons are defined by the Earth's position in its orbit around the Sun. Equinoxes mark equal day and night; solstices mark the longest and shortest days.
Day and night are approximately equal in length. The Sun crosses the celestial equator moving northward.
The longest day in the Northern Hemisphere and shortest in the Southern. The Sun reaches its highest point in the northern sky.
Day and night are again approximately equal. The Sun crosses the celestial equator moving southward.
The shortest day in the Northern Hemisphere and longest in the Southern. The Sun reaches its lowest point in the northern sky.
| Year | March Equinox | June Solstice | Sep Equinox | Dec Solstice |
|---|---|---|---|---|
| 2020 | Mar 20, 03:49 UTC | Jun 20, 21:43 UTC | Sep 22, 13:30 UTC | Dec 21, 10:02 UTC |
| 2021 | Mar 20, 09:37 UTC | Jun 21, 03:31 UTC | Sep 22, 19:20 UTC | Dec 21, 15:59 UTC |
| 2022 | Mar 20, 15:33 UTC | Jun 21, 09:13 UTC | Sep 23, 01:04 UTC | Dec 21, 21:47 UTC |
| 2023 | Mar 20, 21:24 UTC | Jun 21, 14:57 UTC | Sep 23, 06:49 UTC | Dec 22, 03:27 UTC |
| 2024 | Mar 20, 03:06 UTC | Jun 20, 20:50 UTC | Sep 22, 12:43 UTC | Dec 21, 09:20 UTC |
| 2025 | Mar 20, 09:01 UTC | Jun 21, 02:42 UTC | Sep 22, 18:19 UTC | Dec 21, 15:03 UTC |
| 2026 | Mar 20, 14:45 UTC | Jun 21, 08:25 UTC | Sep 23, 00:05 UTC | Dec 21, 20:50 UTC |
| 2027 | Mar 20, 20:24 UTC | Jun 21, 14:10 UTC | Sep 23, 06:01 UTC | Dec 22, 02:42 UTC |
| 2028 | Mar 20, 02:17 UTC | Jun 20, 20:01 UTC | Sep 22, 11:45 UTC | Dec 21, 08:20 UTC |
| 2029 | Mar 20, 08:01 UTC | Jun 21, 01:48 UTC | Sep 22, 17:37 UTC | Dec 21, 14:14 UTC |
| 2030 | Mar 20, 13:51 UTC | Jun 21, 07:31 UTC | Sep 22, 23:27 UTC | Dec 21, 20:09 UTC |
| 2031 | Mar 20, 19:40 UTC | Jun 21, 13:17 UTC | Sep 23, 05:15 UTC | Dec 22, 01:55 UTC |
| 2032 | Mar 20, 01:21 UTC | Jun 20, 19:08 UTC | Sep 22, 11:10 UTC | Dec 21, 07:56 UTC |
| 2033 | Mar 20, 07:22 UTC | Jun 21, 01:00 UTC | Sep 22, 16:51 UTC | Dec 21, 13:45 UTC |
| 2034 | Mar 20, 13:17 UTC | Jun 21, 06:44 UTC | Sep 22, 22:39 UTC | Dec 21, 19:34 UTC |