On Sunday, June 21, 2026, at 02:24 UTC, the Northern Hemisphere experienced the summer solstice. This is the moment when the sun reaches its highest point in the sky, marking the longest day of the year and the official start of astronomical summer. From this day forward, the days get shorter until the winter solstice in December.
If you missed it, do not worry. The change in daylight is gradual. In mid-latitudes, the difference in day length between the solstice and a week later is only a few minutes. But the solstice itself is a precise astronomical event, and understanding it reveals a lot about how Earth's tilt creates our seasons.
What causes the solstice?
Earth does not rotate on a vertical axis. It is tilted by about 23.44 degrees relative to its orbital plane around the sun. This tilt is the reason we have seasons. As Earth orbits the sun, the Northern Hemisphere points toward the sun for half the year and away from it for the other half.
The summer solstice occurs when the Northern Hemisphere is tilted most directly toward the sun. At this moment, the sun appears directly overhead at the Tropic of Cancer (23.44 degrees north latitude). North of the Arctic Circle (66.56 degrees north), the sun does not set at all, creating 24 hours of daylight. South of the Antarctic Circle, the sun does not rise, creating 24 hours of darkness.
The solstice is not a full day. It is a specific moment when the sun's apparent position reaches its northernmost point. In 2026, that moment was June 21 at 02:24 UTC. The exact date and time shift slightly each year because Earth's orbit is 365.24 days, not exactly 365.
Daylight hours by latitude
The amount of daylight on the summer solstice depends entirely on your latitude. The closer you are to the North Pole, the more daylight you get. Here are the daylight hours for several cities on June 21, 2026:
- Reykjavik, Iceland (64.1 degrees N): 21 hours 8 minutes of daylight. The sun barely dips below the horizon, creating a period of twilight called 'white nights' rather than true darkness.
- London, UK (51.5 degrees N): 16 hours 38 minutes of daylight. Sunrise at 4:43 AM, sunset at 9:21 PM.
- New York, USA (40.7 degrees N): 15 hours 5 minutes of daylight. Sunrise at 5:24 AM, sunset at 8:30 PM.
- Miami, USA (25.8 degrees N): 13 hours 45 minutes of daylight. Sunrise at 6:30 AM, sunset at 8:15 PM.
- Quito, Ecuador (0 degrees): 12 hours 7 minutes of daylight. Near the equator, day length barely changes throughout the year.
- Sydney, Australia (33.9 degrees S): 9 hours 54 minutes of daylight. This is the winter solstice in the Southern Hemisphere, making it the shortest day of the year in Sydney.
The contrast is striking. Reykjavik gets more than twice as much daylight as Sydney on the same day. This is why Scandinavia and Iceland celebrate the summer solstice so enthusiastically. After months of near-darkness in winter, the long summer days are a cause for celebration.
Why the earliest sunrise is not on the solstice
A common surprise: the earliest sunrise of the year does not happen on the summer solstice. In most of the Northern Hemisphere, the earliest sunrise occurs a few days before the solstice, and the latest sunset occurs a few days after. In New York, for example, the earliest sunrise is around June 14, and the latest sunset is around June 27.
This happens because solar time (based on the sun's position) and clock time (based on a uniform 24-hour day) do not perfectly align. Earth's orbit is elliptical, and its axis is tilted, which causes the apparent speed of the sun across the sky to vary throughout the year. The difference between solar time and clock time is called the equation of time, and it shifts the earliest sunrise and latest sunset away from the solstice.
The solstice and the analemma
If you photographed the sun at the same clock time every day for a year, you would get a figure-eight shape called an analemma. The top of the figure-eight corresponds to the summer solstice, when the sun is highest. The bottom corresponds to the winter solstice, when the sun is lowest. The width of the figure-eight reflects the equation of time.
The analemma explains why the solstice date varies slightly. Because the sun's apparent motion is not uniform, the exact moment of maximum northern declination can fall on June 20, 21, or 22. In 2026, it was June 21. In 2027, it will be June 21 as well. In 2028, it shifts to June 20.
Solstice traditions around the world
- Sweden and Finland: Midsummer is celebrated with bonfires, maypole dancing, and midnight sun festivals. It is one of the most important holidays of the year.
- Iceland: Secret Solstice festival celebrates 24 hours of daylight with music and outdoor activities.
- England: Thousands gather at Stonehenge to watch the sunrise align with the ancient stones, a tradition that may date back 5,000 years.
- Spain: The Night of San Juan on June 23 features bonfires on beaches, with people jumping over the flames for good luck.
- Ecuador and other Andean countries: Inti Raymi, the Festival of the Sun, is an Inca tradition still celebrated with music, dancing, and ceremonies.
What happens after the solstice?
After June 21, the days gradually get shorter in the Northern Hemisphere. But the change is slow at first. In New York, the day length on July 1 is only about 7 minutes shorter than on the solstice. By August 1, it is about 45 minutes shorter. By September 1, the loss accelerates to about 2-3 minutes per day.
The shortest day of 2026 in the Northern Hemisphere will be the winter solstice on December 21. On that day, New York will have only 9 hours 15 minutes of daylight, compared to 15 hours 5 minutes on the summer solstice. That is a difference of nearly 6 hours of daylight between the longest and shortest days.
Use our Sunrise and Sunset Calculator to check exact sunrise and sunset times for your location on any date, and our Day Length Calculator to see how day length changes throughout the year.