Every year, on four specific evenings, the setting sun aligns precisely with Manhattan’s east-west streets, creating a phenomenon known as Manhattanhenge. This effect occurs because the city’s 1811 street grid is rotated 29 degrees east of true north, matching the sun’s position on the horizon during late spring and midsummer. Though the planners had no astronomical intent, the result mimics ancient solar monuments like Stonehenge.

The term Manhattanhenge was coined by astrophysicist Neil deGrasse Tyson, director of the Hayden Planetarium, who first published photos and analysis of the event in 2002. The full-disc sunset alignment in 2026 occurs on May 29 and July 11, with half-sun sightings on May 28 and July 12. Sunrise alignments also occur in December and January but receive less attention due to early hours and obstructed views on the east side.

Best viewing spots include wide cross streets like 14th, 23rd, 34th, 42nd, and 57th, where unobstructed sightlines to the New Jersey horizon allow clear views of the sun. While other grid cities like Chicago and Toronto experience similar effects, Manhattan’s consistent layout, wide streets, and open western vista make it one of the most dramatic examples. The event highlights how urban infrastructure can unintentionally reflect cosmic rhythms.