In North America, in which month is 'Bike-To-Work Day' traditionally held?

'Bike to Work Day' is an annual event held on various days in the Spring across the United States and Canada that promotes the bicycle as an option for commuting to work.

'Bike Month' is held in May each year, and 'Bike to Work Week' is the week of 'Bike to Work Day', which varies from city to city.

'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'.

Leading up to 'Bike to Work Day', national, regional, and local bicycle advocacy groups encourage people to try bicycle commuting as a healthy and safe alternative to driving by providing route information and tips for new bicycle commuters. Furthermore, the American Medical Association has endorsed 'Bike to Work Day' as part of its push to encourage active transportation. The event is supported by many organizations, from local bike shops and restaurants to municipalities and transit authorities.

The southern California commuter rail network 'Metrolink' offers free rides to cyclists on 'Bike to Work Day'.