Manhattanhenge in 2019. Image via SecretNewYork. Every year around May 29 and 30 – and again for a day or two around July 12 – people in New York City look forward to Manhattanhenge. It’s a phenomenon where the sunset aligns perfectly with the streets of Manhattan, particularly along 42nd, 34th and 14th Streets. It happens twice every year – around the end of May and early July. According to the Farmer’s Almanac, the best dates and times for Manhattanhenge in 2021 are: Saturday, May 29 at 8:13 p.m. EDT (half sun)* Sunday, May 30 at 8:12 p.m. EDT (full sun)* Monday, July 12 at 8:20 p.m. EDT (full sun)