European Car Free Day was initiated by the European Commission in 2000 and since then it has been one of the most important European days in environmental protection. The event has a fixed date of September 22. The main intention of the campaign is to draw attention to the unsustainable increase in individual car traffic in cities and to various ways of solving it - support for public road and rail transport, building cycle paths, improving the quality of pedestrian areas, etc.
The European Mobility Week (EMW) is an annual campaign that takes place from 16th to 22nd September, aimed at promoting sustainable transportation. In the Czech Republic, the campaign has been organized since 2002, with the majority of participating cities and municipalities being members of the National Network for Sustainable Mobility. Municipalities can choose to participate in the full week-long campaign or organize a one-day event. Participation requires the approval of the Charter, which sets the rules and framework for the campaign. The Ministry of the Environment of the Czech Republic coordinates the national implementation of the campaign. In addition to EMW, various organizations in the Czech Republic organize events to promote sustainable and active mobility, such as "Walking to School," "Cycle to Work," "10,000 Steps Challenge," and "Experience the City Differently." In 2022, nearly 3,000 municipalities from 51 countries participated in the campaign, including 26 municipalities in the Czech Republic.