Park(ing) Day is a worldwide event seeking to highlight just how much public space is reserved for the sake of automobiles. Participants claim a parking space for a day and transform the space into a park, using plants, chairs, games and other elements that make public space attractive. The first Park(ing) Day was held in 2005, by the urban design group Rebar, which has since spear-headed the cause and turned Park(ing) day into a national event held on the third Friday of September. Parks do not have to be elaborate. Instead, the emphasis is on creating a space that is inviting and allows motorists and pedestrians alike to consider how big an impact a small space can make. Park(ing) Day 2011 took place in over 160 cities in 35 countries, with a bigger presence yearly.