Manhattanhenge Is Back for Picture-Perfect Sunsets on New York’s Grid

It’s time for New Yorkers to get very excited about the setting sun.

That’s because Manhattanhenge is upon us. It can produce, when the weather cooperates, four of the most striking sunsets of the year in New York City.

The name is a New Yorker-style nod to Stonehenge, the ancient rock structure in the English countryside that aligns with the sunsets and sunrises during the summer and winter solstices. That pre-modern monument was purposely built for religious and spiritual reasons. In contrast, the grid of New York City was not designed with sunsets in mind, but it has ended up functioning in a similar manner. Across four days every May and July, it can bring people together to admire our particular geographic location in the cosmos as the sun settles into the horizon, disappearing perfectly along the city’s broad west-east corridors.

An event like Manhattanhenge can halt the entire borough, beckoning people to celebrate an otherwise normal daily sunset.

As if New York couldn’t become any more magical, the sunsets of Manhattanhenge illuminate the streets with a glow of deep tangerine and bubble gum pink, transforming the bustling streets into a place to pause and say, “wow.”

“It’s so famous because it’s a gorgeous sunset,” said Jackie Faherty, senior scientist and astrophysicist at the American Museum of Natural History. “The sun kisses the grid of one of the greatest cities, if not the greatest city in the world, and touches the whole corridor of the concrete jungle with these amazing golden hues. It’s a beautiful thing.”

When is Manhattanhenge?

You’ll get four chances to see it — twice in the spring and twice in the summer, on either end of the summer solstice the longest day of the year, on June 21.

This long Memorial Day weekend, Manhattanhenge occurs two times:

• Sunday, May 29, a half sun at 8:13 p.m. Eastern time.

• Monday, May 30, a full sun at 8:12 p.m.

Then in July, you’ll get two more chances to see a grid-perfect sunset:

• Monday, July 11, a full sun at 8:20 p.m.

• Tuesday, July 12, a half sun at 8:21 p.m.

Why does Manhattanhenge happen?

We’re able to witness this celestial event because of a combination of the approaching summer solstice, the grid design of the city and the natural shape the island of Manhattan took on during the last ice age.

Some 18,000 years ago, the massive ice sheet atop North America began to melt, carving out Manhattan island and the modern landscape on which the city was built.

“We think that Manhattan Island runs north-south. But it doesn’t actually run north south; it runs northeast to southwest,” said Carol Krinksy, an American architectural historian at New York University.

This orientation in combination with the street design allow for the western setting sun to put on this show, she said.

“The grid system was designed for Manhattan before there was even an official New York City,” Dr. Krinsky added. The Commissioners’ Plan of 1811 put 90-degree blocks into motion for the official design of the city. Perhaps unsurprisingly, this was mainly for the real estate market: Most home buyers don’t want to purchase lots cut into weird angles.

So above 14th Street and below 155th Street, the city is sliced into a grid. When the Earth tilts toward and then away from the sun during the summer solstice, our beloved Manhattanhenge is the result. It also shows how the structures built by people interact with the natural world.

“Things like this are deeply connected not just to the actual architecture of the universe around us, but to our interaction with it,” said Caleb Scharf, an astronomer at Columbia University. “The city is an extension of us.”

Dr. Scharf adds that just like Stonehenge, Manhattanhenge helps us find patterns in our surroundings and make sense of them.

“At some point, someone is going to have the question of, ‘Why is that happening?’” he said. “‘Wait a minute, oh, the sun doesn’t stay at the same place on the horizon all the time. Why is that?’ This can so often lead to those ‘Aha!’ moments where we suddenly have this urge to actually explain what we’re seeing, as opposed to just saying, ‘Oh, that’s nice.’”

Where are the best places to watch?

Luckily, anywhere within the grid system above 14th Street can give you some sort of a view.

You also need to have a clear view of New Jersey, and, Dr. Faherty adds, “You really have to be in the middle of the street for the full effect, which is a tad dangerous.”

Ideally, pick a street with wide avenues and a median that you can stand on and watch from safely. If there’s a big hill, your view will be blocked.

Though nearly everyone goes to 42nd Street, Dr. Faherty recommends 72nd Street, instead. But if you want to join the crowds further downtown, Pershing Square is prime viewing, as is the area above Grand Central Station in the taxi line. While the New York Police Department tries to shut down viewing there every year, photographers crowd the location and it can be quite chaotic.

Manhattanhenge is also visible outside of Manhattan. In Brooklyn or Queens, Dr. Faherty says there are a variety of locations where you can see straight across the city to New Jersey. For the best experience off the island, she recommends Gantry State Park in Queens.