A University of Texas campus club called the Knighthood of Buh first started 'No Pants Day' which was piadapted by New Yorkers in 2002 and was then picked up in the UK by The Stiff Upper Lip Society.
This year, for the first time, the bizarre tradition has spread to Jerusalem.
Information for the event said: “At 3pm, participants will be organised into groups, and will walk to a nearby station.
“When told to by your group leader, remove your trousers, and put them into your backpack.
“For the remainder of the journey, sit in the car as you normally would. Read a magazine or whatever you would normally do.”
The organisers added: “You can wear fun underwear if you like, but nothing that screams out, 'I wore this because I’m doing a silly stunt.'