Two days of the year, the sunset aligns perfectly with the city streets of Manhattan, illuminating every cross street.
This is called the “Manhattanhenge” and it will happen this year on May 30 and July 12. The name evokes the legendary Stonehenge monument that has befuddled anthropologists for centuries. The idea is that, as is the case with Stonehenge, future anthropologists will try to infer some sort of meaning to the architectural layout of Manhattan. The sunset aligns with many of the Stonehenge structures during the summer solstice. Manhattanhenge has no such celestial significance. The sunset aligns with the grid on Memorial Day and Major League Baseball’s All-Star Break.
You can learn more about Manhattanhenge at the Hayden Planetarium's website (which is not to be confused with the Hayden Panettierium).