The No Pants Subway Ride is an annual event where people ride the subway while not wearing pants. The event is organized by Improv Everywhere, and has coordinators in cities around the world. In 2016, the event was scheduled to take place on January 10.
The first No Pants Subway Ride began with seven riders in 2002 in New York City. In 2006, 150 people participated in New York City. During that event, eight were handcuffed for disorderly conduct, but the charges were later dismissed. For 2013, sixty cities had coordinators. In January 2016, the event happened for the first time in Moscow, Russia. The participants were investigated by the police under the offense of the "instigating of mass public disorder", however there are opinions the accusations would not stand ground, since the organizers' goal was to make people laugh. Wikipedia
1. No pants day!