No Pants Subway Ride is an annual event where people ride the subway with no pants on.

Of course, that’s the American definition of pants (it’s known as No Trousers Tube Ride in the UK), so people don’t actually walk around with their lower half exposed, but it’s still a glorious sight nonetheless.

Related: Cheeky! Thousands of guys travel on the subway in their underwear

Despite the winter chill, thousands of people from around the world took part in the modern tradition on Sunday, with New Yorkers in particular braving bitterly cold temperatures as low as -8°C.

“The mission started as a small prank with seven guys and has grown into an international celebration of silliness, with dozens of cities around the world participating each year,” explained Improv Everywhere, who organise the event.

Check out some of the best photos from the day, as shared by the public, below.

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