Solstices and equinoxes: what the Sun is actually doing, and the 2026-27 dates
The four turning points of the year are about Earth's tilt, not distance from the Sun. Here is what a solstice and an equinox really are, the exact dates for 2026, and why the seasons and the zodiac line up.
In this story
A solstice is when the Sun reaches its highest or lowest point in the sky at noon. An equinox is when day and night are close to equal. All four happen because Earth's axis is tilted, not because Earth gets closer to or further from the Sun.
Here are the basics: what the four turning points of the year actually are, when they land, and why the seasons and the zodiac begin at the same place.
It is the tilt, not the distance
A very common belief is that summer happens because Earth is closer to the Sun. It is not true. In fact, Earth is closest to the Sun (perihelion) in early January, in the middle of the northern winter, and furthest away (aphelion) in early July.
Seasons come from the tilt. Earth's axis leans about 23.4 degrees from the vertical to its orbit. Over the year, sometimes the northern hemisphere leans toward the Sun and sometimes it leans away. When it leans toward the Sun, sunlight arrives at a steeper angle and days are longer, so that hemisphere warms up. When it leans away, the light is at a shallower angle and days are shorter. NASA has a clear explainer in Embracing the Equinox.
The four moments
- March equinox: the Sun crosses the celestial equator heading north. Day and night are close to equal everywhere on Earth.
- June solstice: the Sun reaches its northernmost point. It is the longest day in the northern hemisphere and the shortest in the southern.
- September equinox: the Sun crosses the celestial equator heading south. Day and night are again close to equal.
- December solstice: the Sun reaches its southernmost point. It is the shortest day in the north and the longest in the south.
"Solstice" comes from Latin words meaning "Sun stands still". Around the moment of the solstice the Sun's noon height barely changes for a few days, before it turns back.
The dates for 2026
These are the instants in UTC. Local dates and times depend on your time zone.
- March equinox: 20 March 2026, about 14:46 UTC.
- June solstice: 21 June 2026, about 08:25 UTC.
- September equinox: 23 September 2026, about 00:05 UTC.
- December solstice: 21 December 2026, about 20:50 UTC.
That means the next one on the calendar as I write this is the December solstice, on 21 December. The dates move by a day or so from year to year, because the calendar year does not match Earth's orbit exactly, and the leap-year system nudges them back into place.
"Equal day and night" is only approximately true
On the equinox, day and night are not exactly 12 hours each. For a few reasons, including the way sunrise and sunset are defined (the top edge of the Sun, plus a bit of bending of light by the atmosphere), the day is a few minutes longer. The date when they really match is called the equilux, and it falls a few days before the September equinox and a few days after the March one.
Why it matters for the zodiac
The tropical zodiac is defined by this cycle. Its starting point, 0 degrees Aries, is the position of the Sun at the March equinox, and the other three cardinal points, 0 Cancer, 0 Libra and 0 Capricorn, are the other three turning points. That is why a tropical astrologer will say "the Sun enters Aries at the equinox". They are describing a season, not a star group.
Over thousands of years, the slow wobble of Earth's axis moves the equinox point backward through the constellations. That is the reason the tropical and sidereal zodiacs have drifted apart, and it is explained in why the zodiac drifted.
Southern hemisphere note
If you live south of the equator, every one of these flips. The December solstice is your summer solstice, and the June one is your winter. Most articles are written from a northern point of view, so it is worth remembering when a date says "the first day of spring".
Why I care about the Sun
I put the Sun at the centre of my work on purpose. It is the thing you can go and stand in, and its rhythm is easy to feel: light in the morning, brightness at noon, the length of the day. For an ADHD mind that struggles with time, that is a very practical anchor. Getting daylight early in the day is one of the simplest things I do, and it is free. If you want to make it a habit, what replaces the weed has a few ideas for using the morning well.
Mark the day
You do not need a ritual to notice a solstice. Go outside at noon, look at where your shadow falls, and do the same again in three months. It is a quiet, cheap experiment, and it makes the tilt of the planet feel real. If you like doing things with others, the ADHD MindFlow community is a good place to share what you notice.
Astronomy facts here are checked against the sources linked. Astrology is a way to reflect, not science, and it does not predict events.
Astrology is a way to reflect, not science, and it does not predict events. Astronomy facts here are checked against the sources linked. Read our sources, commercial disclosure and editorial approach.
Follow your curiosity.
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