Equinoxes & Solstices 2031
Exact moments the seasons change
In 2031, the March equinox is on 20 March 2031, the June solstice on 21 June 2031, the September equinox on 23 September 2031 and the December solstice on 22 December 2031 (UTC). The next one is the March equinox, 20 March 2031, 19:41 UTC.
March equinox
20 March 2031, 19:41 UTC
Start of spring (north) · autumn (south)
June solstice
21 June 2031, 13:17 UTC
Start of summer (north) · winter (south)
September equinox
23 September 2031, 05:15 UTC
Start of autumn (fall) (north) · spring (south)
December solstice
22 December 2031, 01:56 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, 12:41 PM | 21 Jun, 6:17 AM | 22 Sep, 10:15 PM | 21 Dec, 5:56 PM |
| New York City | 20 Mar, 3:41 PM | 21 Jun, 9:17 AM | 23 Sep, 1:15 AM | 21 Dec, 8:56 PM |
| London | 20 Mar, 7:41 PM | 21 Jun, 2:17 PM | 23 Sep, 6:15 AM | 22 Dec, 1:56 AM |
| Dubai | 20 Mar, 11:41 PM | 21 Jun, 5:17 PM | 23 Sep, 9:15 AM | 22 Dec, 5:56 AM |
| Delhi | 21 Mar, 1:11 AM | 21 Jun, 6:47 PM | 23 Sep, 10:45 AM | 22 Dec, 7:26 AM |
| Dhaka | 21 Mar, 1:41 AM | 21 Jun, 7:17 PM | 23 Sep, 11:15 AM | 22 Dec, 7:56 AM |
| Tokyo | 21 Mar, 4:41 AM | 21 Jun, 10:17 PM | 23 Sep, 2:15 PM | 22 Dec, 10:56 AM |
| Sydney | 21 Mar, 6:41 AM | 21 Jun, 11:17 PM | 23 Sep, 3:15 PM | 22 Dec, 12:56 PM |
Calculated with Jean Meeus’s algorithms; times are accurate to about a minute.
Frequently asked questions
When is the first day of spring 2031?
Astronomical spring in the Northern Hemisphere begins at the March equinox: 20 March 2031, 19:41 UTC. (Meteorologists count spring from 1 March.)
When is the summer solstice 2031?
The June solstice — the longest day in the Northern Hemisphere — is at 21 June 2031, 13:17 UTC.
When is the first day of fall 2031?
The September equinox, the start of astronomical autumn in the north, is at 23 September 2031, 05:15 UTC.
When is the winter solstice 2031?
The December solstice — the shortest day in the Northern Hemisphere — is at 22 December 2031, 01:56 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.