North America is about to experience its longest day of 2026. At precisely 4:24 a.m. EDT on Sunday, June 21, the summer solstice will occur, marking the beginning of astronomical summer and bringing the year’s maximum amount of daylight to the Northern Hemisphere. The sun will follow its highest path through the sky of the year, producing the longest day and shortest night of 2026. Wherever you are in North America, you’ll experience a slightly different version of the same event, depending on your latitude, with northern locations enjoying dramatically longer days than places closer to the equator.

June’s solstice occurs at exactly 4:24 a.m. EDT (3:24 a.m. CDT, 2:24 a.m. MDT, 1:24 a.m. PDT and 12:24 a.m. AKDT) on Sunday, June 21. The solstice occurs simultaneously around the world, regardless of time zones.

You won’t notice the precise moment it occurs, but the effects will be visible throughout the day as the sun reaches its highest annual position in the sky.

The solstice is one of four major markers in Earth’s yearly orbit around the sun, alongside the December solstice and the March and September equinoxes.

The solstice will be celebrated across North America at events including Seattle’s Fremont Solstice Parade , Santa Barbara’s Summer Solstice Celebration and Canada’s National Indigenous Peoples Day , while museums including Harvard’s Museums of Science & Culture , the Smithsonian and the National Gallery of Art will host special programs marking the longest day of the year.

What You’ll Notice Across North America

The most obvious effect of the summer solstice is the amount of daylight you’ll experience, though exactly how dramatic the change feels depends on where you live. In Alaska and northern Canada, some communities will enjoy nearly 20 hours of daylight, while areas above the Arctic Circle will continue to experience the midnight sun, where the sun remains visible around the clock. Across much of the northern U.S. and southern Canada, daylight will stretch to roughly 15 to 16 hours. Cities such as Seattle, Minneapolis and Toronto will enjoy some of the continent’s longest days outside the Arctic. Farther south, the effect is less dramatic but still noticeable. Residents of cities including Atlanta, Houston and Miami can expect around 14 to 15 hours of daylight.

Extreme Sunrise And Sunset Points

The sun’s path across the sky also reaches its annual extremes on the solstice, causing extreme sunrises and sunsets. On June 21, the sun will rise at its most northeasterly point on the horizon and set at its most northwesterly point of the year. It will also reach its highest altitude at local noon. These shifts happen gradually over many months, making them difficult to notice from one day to the next. However, the June solstice marks the moment when the sun reaches its northernmost position as seen from Earth, causing in the longest day and shortest night of the year across the Northern Hemisphere.

The event is caused by Earth’s 23.5-degree axial tilt. As Earth orbits the sun, the Northern Hemisphere is currently tilted most directly toward the sun. This allows sunlight to strike northern latitudes more directly and for a longer portion of each day. At the moment of the solstice, the sun appears directly overhead at the Tropic of Cancer, an imaginary line located approximately 23.5 degrees north of the equator that passes through countries including Mexico, Egypt and India. The effects become increasingly dramatic toward the poles. At the North Pole, the sun does not set, while at the South Pole it remains below the horizon.