Skateboarding is the act of both riding on and performing tricks using a skateboard. A person who skateboards is most often referred to as a skateboarder or a skater.Skateboarding is relatively modern. A key Skateboarding maneuver, the ollie, was developed in the late 1970s. In the early '80s freestyle skateboarder Rodney Mullen invented the ollie kickflip. Go Skateboarding Day was created in 2004 by a group of Skateboarding companies to promote Skateboarding and help make it more noticeable to the world. It is celebrated every year on June 21st.