Why equinox dates disagree: 22 or 23 September?
The September 2026 equinox is one instant: 00:05 UTC on 23 September, but 20:05 on the 22nd in New York. The city you pick in the tool decides the date.
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The next equinox is on 20 March 2027 at 20:24 UTC: 16:24 in New York, 21:24 in Paris. Type 2027 and your city in the tool and read the Local time column.
The September equinox came at 00:05 UTC on 23 September 2026, so the next one falls in another year. Its time depends on your time zone: when is it on your clock? Type 2027 and your city into the equinox and solstice dates tool: 20 March 2027, 16:24 in New York, 21:24 in Paris.
UTC, Coordinated Universal Time, is the reference clock of time zones. The year you type matters most. The form opens on the current year: in 2026, that answer ends with the December solstice, and the March equinox only appears in the 2027 answer.
Type the year the equinox falls in, pick your city, and press Compute. Each answer covers one calendar year, from January to December.
The city goes under From a place (optional). Start typing its name, then pick it from the suggestions: the choice brings the city’s time zone, which the local times need.
It is in the first table, Equinoxes & solstices of the year: the row of your event, in the column headed Local time. Here are the next four equinoxes and solstices as the tool gives them:
| Event | Instant (UTC) | New York | Paris |
|---|---|---|---|
| December solstice 2026 | 21 December, 20:50 | 21 December, 15:50 | 21 December, 21:50 |
| March equinox 2027 | 20 March, 20:24 | 20 March, 16:24 | 20 March, 21:24 |
| June solstice 2027 | 21 June, 14:10 | 21 June, 10:10 | 21 June, 16:10 |
| September equinox 2027 | 23 September, 06:01 | 23 September, 02:01 | 23 September, 08:01 |
Yes: the tool applies the offset in force on the date of each event. New York is five hours behind UTC for the December 2026 solstice, and four hours behind for the March 2027 equinox. Paris is one hour ahead in March and two hours ahead in June.
Converting by hand, it is easy to apply today’s offset instead of the one in force on the day. The offsets come from the IANA time zone database, whose name for your zone, such as America/New_York, is printed in the column header.
Yes: under the answer, Add to my calendar downloads the year’s two equinoxes and two solstices as a calendar file (.ics). The file holds the year you computed, so compute 2027 first for the March 2027 equinox.
Each event is stored as a UTC instant, to the second. Your calendar app then places it at the right moment on its own clock, wherever you open it.
No. It asks for a city you choose, never for your device’s position, and the city is optional: without one, every instant comes in UTC only.
With your city picked, the table Daylight on the four days gives sunrise, sunset and day length for each equinox and solstice. For New York on 20 March 2027, the tool gives sunrise at 06:59, sunset at 19:08, and 12h08 of daylight.
Yes: pick that city instead of your own. The Local time column then shows its clock and its date, whatever the time zone of the device you use.
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Picked from the index by this article's tags — the closest first, outside its series. Nothing is written by hand: a piece published tomorrow with the same tags takes its place here.
The September 2026 equinox is one instant: 00:05 UTC on 23 September, but 20:05 on the 22nd in New York. The city you pick in the tool decides the date.
The equinox has no fixed date: in UTC, September's falls on the 23rd in 2026 and on the 22nd in 2028. Type a year in the tool to get its four dates.
Chicagohenge: 19–23 September 2026 and 19–23 March 2027. Manhattanhenge: 25 May–8 June and 3–17 July 2027. How to get the dates, and your own street's.
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