World Car Free Day is marked every year on 22 September. The day encourages people to travel without using private cars and to choose cleaner and safer modes of transport such as walking, cycling and public transit. By highlighting the benefits of leaving cars at home, it draws attention to issues like air pollution, traffic congestion and road safety in cities. For exams, remember the date (22 September) and the purpose of the day: promoting car-free travel and cleaner, safer transport.