January 13th, Amsterdam. As in years past, there are No Pants Subway Rides happening in dozens of cities around the world on January 13, the same day as their annual event in New York. The No Pants Subway Ride is an annual event staged by Improv Everywhere every January in New York City. The idea behind No Pants is simple: Random passengers board a subway car at separate stops in the middle of winter without pants. The participants behave as if they do not know each other, and they all wear winter coats, hats, scarves, and gloves. The only unusual thing is their lack of pants.