Groundation Day Celebrant is a term used to describe a Rasta, which is a person who follows the Rastafari movement. The Rastafari movement is a religious and social movement that originated in Jamaica in the 1930s. It is based on the teachings of Marcus Garvey, a Jamaican political leader, and is centered around the worship of Haile Selassie I, the former Emperor of Ethiopia. Groundation Day is an annual celebration of the Rastafari movement, and Rastas are the main celebrants of this day.