Equinoxes & Solstices 2025
Exact moments the seasons change
In 2025, the March equinox is on 20 March 2025, the June solstice on 21 June 2025, the September equinox on 22 September 2025 and the December solstice on 21 December 2025 (UTC).
March equinox
20 March 2025, 09:01 UTC
Start of spring (north) · autumn (south)
June solstice
21 June 2025, 02:42 UTC
Start of summer (north) · winter (south)
September equinox
22 September 2025, 18:19 UTC
Start of autumn (fall) (north) · spring (south)
December solstice
21 December 2025, 15:03 UTC
Start of winter (north) · summer (south)
Local times around the world
| City | March eq. | June sol. | September eq. | December sol. |
|---|---|---|---|---|
| Los Angeles | 20 Mar, 2:01 AM | 20 Jun, 7:42 PM | 22 Sep, 11:19 AM | 21 Dec, 7:03 AM |
| New York City | 20 Mar, 5:01 AM | 20 Jun, 10:42 PM | 22 Sep, 2:19 PM | 21 Dec, 10:03 AM |
| London | 20 Mar, 9:01 AM | 21 Jun, 3:42 AM | 22 Sep, 7:19 PM | 21 Dec, 3:03 PM |
| Dubai | 20 Mar, 1:01 PM | 21 Jun, 6:42 AM | 22 Sep, 10:19 PM | 21 Dec, 7:03 PM |
| Delhi | 20 Mar, 2:31 PM | 21 Jun, 8:12 AM | 22 Sep, 11:49 PM | 21 Dec, 8:33 PM |
| Dhaka | 20 Mar, 3:01 PM | 21 Jun, 8:42 AM | 23 Sep, 12:19 AM | 21 Dec, 9:03 PM |
| Tokyo | 20 Mar, 6:01 PM | 21 Jun, 11:42 AM | 23 Sep, 3:19 AM | 22 Dec, 12:03 AM |
| Sydney | 20 Mar, 8:01 PM | 21 Jun, 12:42 PM | 23 Sep, 4:19 AM | 22 Dec, 2:03 AM |
Calculated with Jean Meeus’s algorithms; times are accurate to about a minute.
Frequently asked questions
When is the first day of spring 2025?
Astronomical spring in the Northern Hemisphere begins at the March equinox: 20 March 2025, 09:01 UTC. (Meteorologists count spring from 1 March.)
When is the summer solstice 2025?
The June solstice — the longest day in the Northern Hemisphere — is at 21 June 2025, 02:42 UTC.
When is the first day of fall 2025?
The September equinox, the start of astronomical autumn in the north, is at 22 September 2025, 18:19 UTC.
When is the winter solstice 2025?
The December solstice — the shortest day in the Northern Hemisphere — is at 21 December 2025, 15:03 UTC.
Why does the date change from year to year?
A year is about 365.24 days long, so the moment of each equinox and solstice shifts by roughly six hours a year, and leap days pull it back. Local time zones can also move it to a different calendar date.