Summer Solstice, longest day of 2026 in Northern Hemisphere

The summer solstice falls on June 21, 2026 at 04:24 UTC, marking the longest day in the Northern Hemisphere and the official start of astronomical summer. On that day the sun reaches its northernmost point, giving locations inside the Arctic Circle up to 24 hours of daylight and pushing very late sunsets across northern Britain and Scandinavia. Communities from Stonehenge and Avebury in the UK to Fairbanks, Alaska stage sunrise rituals, midnight-sun festivals, and Stonehenge provides public livestreams for those who cannot attend in person. The extra daylight speeds fruit ripening for gardeners, shifts wildlife activity toward dawn-to-dusk patterns, and concentrates summer tourism and outdoor events in high-latitude regions.