Season times in 2025
The 6 season records the U.S. Naval Observatory publishes for 2025: equinoxes, solstices, perihelion and aphelion, each with its Universal Time date and clock time and the same moment read on a UTC+8 clock.
| Date (UT) | Time (UT) | Event | Date (UTC+8) | Time (UTC+8) | Source file |
|---|---|---|---|---|---|
| 2025-01-04 | 13:28 | Perihelion | 2025-01-04 | 21:28 | usno_seasons_2025.json |
| 2025-03-20 | 09:01 | Equinox | 2025-03-20 | 17:01 | usno_seasons_2025.json |
| 2025-06-21 | 02:42 | Solstice | 2025-06-21 | 10:42 | usno_seasons_2025.json |
| 2025-07-03 | 19:55 | Aphelion | 2025-07-04 | 03:55 | usno_seasons_2025.json |
| 2025-09-22 | 18:19 | Equinox | 2025-09-23 | 02:19 | usno_seasons_2025.json |
| 2025-12-21 | 15:03 | Solstice | 2025-12-21 | 23:03 | usno_seasons_2025.json |
computed: the published UTC date and time above, read on a UTC+8 clock (China Standard Time); the USNO API publishes UTC and no China-time field
Source and period
Figures on this page are read from these source records: U.S. Naval Observatory, Astronomical Applications Department - Earth's Seasons: Equinoxes, Solstices, Perihelion and Aphelion, 2025 (API record; times in Universal Time). The period covered is the 2025 calendar year. Records fetched 2026-10-31.