The Scientific Frontier

Northern Hemisphere

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The Northern Hemisphere illuminated by the sun at its highest point during the summer solstice, signifying the longest day of the year.
Cosmos & Physics

Summer Solstice 2026 longest day Northern Hemisphere arrives June 21

At 4:24 A.M. EDT on June 21, 2026, the Northern Hemisphere will officially experience its longest day, a precise astronomical moment marking the zenith of solar illumination. This specific timing, con

Dr. Evelyn Reed·June 21, 2026