just parsing the difference...
No Pants Day is an event celebrated on the first Friday of May each year.
No Pants Subway Ride is an annual event in which transit passengers ride trains without wearing pants in January.
It is organized by
Improv Everywhere and observed in dozens of cities worldwide. In the UK, where the word
pants refers to
underwear, the event has been translated as
"No Trousers Subway Ride". In 2013, sixty cities participated in the event.
The first No Pants Subway Ride began with seven riders in 2002 in New York City. In 2006, 150 riders in New York City participated, where eight were handcuffed for disorderly conduct, but in court the charges were dismissed.
/wikipedia
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