Started in 2002 by Improv Everywhere, a prank collective based in
New York, "No pants subway ride" started with only seven
participants.
12 years later, the day is now marked in over 60 cities around the
world.
On "No pants subway ride" day, random passengers take the subway in
the middle of winter, without wearing trousers. Participants wear
all of the usual winter clothing on their top half such as hats,
scarves, and gloves and do not acknowledge each other's similar
state of undress.


Some
riders enter the New York subway in their underwear as they take
part in the 2014 No Pants Subway Ride on 12 January
2014.

A
participant takes part in the "No Pants Subway Ride" in Beijing on
12 January 2014.

couple
taking part in the "No Pants Subway Ride" remains on a metro train
in Buenos Aires on 12 January 2014. "No Pants Subway Ride" is an
annual event in which transit passengers ride trains without
wearing pants in January. The event is observed in dozens of cities
worldwide.

Two
riders in the New York City subway in the underwear as they take
part in the 2014 No Pants Subway Ride January 12, 2014.

Passengers
without pants ride a train during the "No Pants Subway Ride" in
Chicago, Illinois on 12 January 2014.

A
woman without pants waits on a subway platform during the "No Pants
Subway Ride" in Chicago, Illinois, on 12 January 2014. A man looks
on at a woman with no pants on, as she appears normal.

Passengers
without pants ride a train during the "No Pants Subway Ride" in
Chicago, Illinois, on 12 January 2014.

Passengers
without their pants exit a subway during the "No Pants Subway Ride"
at Alexanderplatz subway station in Berlin on 12 January
2014.