Created by Utah-based artist Jake Parker, World Art Drop Day happens every first Tuesday in September—that means that this year the celebration of exchange happens on Tuesday, Sept. 4. The idea is this—every artist, whatever their medium, is encouraged to drop a piece of art wherever they find themselves that day. After hiding the piece, they take a picture, drop a pin, or something of the sort, and share it on social media or otherwise among friends. Then, simply move on, hoping that someone finds it. In that way, the event hopes to encourage exchange and connection, at times even among relative strangers.