Bike to Work Day was originated by the League of American Bicyclists in 1956 and is a part of Bike-to-Work Week, which is in turn part of National Bike Month.
Bike to Work Day is an annual event that promotes the bicycle as a form of transportation to and from work. It is held in the Spring in many locations including the United States, Canada, Europe and Asia.
Leading up to Bike to Work Day, national, regional, and local bicycle advocacy groups encourage people to commute by bicycle as a healthy and safe alternative to driving. The American Medical Association has endorsed Bike to Work Day as part of a push to encourage active transportation.
Bike Week is the week that includes the Bike-to-Work Day, in May, and the World Bicycle Day, on June 3.