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Solstices & equinoxes 2026–2040

All four seasonal instants — March and September equinoxes, June and December solstices — computed to UTC minutes from the same solar math as our city and sun pages.

Next upcoming event

NextDecember solstice 2026-12-21 20:46 UTC

The highlighted event is relative to this page's render time and can lag by up to the caching window; the table below is the durable source of truth.

All season instants, 2026–2040

UTC instants and dates. Northern-hemisphere names; the southern hemisphere experiences the opposite seasons at each instant.

YearEventUTC dateUTC time
2026March equinox2026-03-2014:30
2026June solstice2026-06-2108:15
2026September equinox2026-09-2300:07
2026December solsticeNext2026-12-2120:46
2027March equinox2027-03-2020:19
2027June solstice2027-06-2114:03
2027September equinox2027-09-2305:56
2027December solstice2027-12-2202:35
2028March equinox2028-03-2002:08
2028June solstice2028-06-2019:50
2028September equinox2028-09-2211:44
2028December solstice2028-12-2108:25
2029March equinox2029-03-2007:57
2029June solstice2029-06-2101:38
2029September equinox2029-09-2217:33
2029December solstice2029-12-2114:14
2030March equinox2030-03-2013:46
2030June solstice2030-06-2107:26
2030September equinox2030-09-2223:21
2030December solstice2030-12-2120:04
2031March equinox2031-03-2019:35
2031June solstice2031-06-2113:14
2031September equinox2031-09-2305:10
2031December solstice2031-12-2201:53
2032March equinox2032-03-2001:24
2032June solstice2032-06-2019:02
2032September equinox2032-09-2210:58
2032December solstice2032-12-2107:43
2033March equinox2033-03-2007:13
2033June solstice2033-06-2100:50
2033September equinox2033-09-2216:47
2033December solstice2033-12-2113:32
2034March equinox2034-03-2013:02
2034June solstice2034-06-2106:38
2034September equinox2034-09-2222:36
2034December solstice2034-12-2119:22
2035March equinox2035-03-2018:50
2035June solstice2035-06-2112:26
2035September equinox2035-09-2304:24
2035December solstice2035-12-2201:12
2036March equinox2036-03-2000:39
2036June solstice2036-06-2018:14
2036September equinox2036-09-2210:13
2036December solstice2036-12-2107:01
2037March equinox2037-03-2006:28
2037June solstice2037-06-2100:02
2037September equinox2037-09-2216:01
2037December solstice2037-12-2112:51
2038March equinox2038-03-2012:17
2038June solstice2038-06-2105:50
2038September equinox2038-09-2221:50
2038December solstice2038-12-2118:40
2039March equinox2039-03-2018:06
2039June solstice2039-06-2111:38
2039September equinox2039-09-2303:38
2039December solstice2039-12-2200:30
2040March equinox2040-03-1923:55
2040June solstice2040-06-2017:26
2040September equinox2040-09-2209:27
2040December solstice2040-12-2106:19

How much daylight swings: London vs Sydney

Day length on the 2026 solstice dates (sampled at local noon). The hemispheres are inverted — Sydney's longest day is London's shortest.

CityJune 21December 21
London16h 38m7h 50m
Sydney9h 54m14h 24m

In 2026, London runs about 16h 38m of daylight at the June solstice versus 7h 50m in December — a swing of roughly 8h 48m . Sydney inverts it: 9h 54m in June versus 14h 24m in December.

Method & sources

Each instant is found by searching the solar declination — the latitude of the subsolar point — computed from the same low-precision almanac model the rest of the site uses (vendored SunCalc). Equinoxes are the declination zero crossings; solstices are the declination maximum (June) and minimum (December), which in this model are equivalent to the formal ecliptic-longitude definitions. Because the model fixes the perihelion at its year-2000 value, this page adds the standard perihelion-precession term so the instants stay aligned with published almanacs; the residual accuracy is about ±20 minutes.

Values are computed deterministically from the year, cross-checked against the US Naval Observatory's Earth's Seasonsdata for 2026–2028. Read the full computation contract on our methodology page.