events
The Netherlands experiences the first car-free Sunday caused by the 1973 oil crisis. Highways are used only by cyclists and roller skaters.
Related Wikipedia articles
1973 oil crisis
OAPEC petroleum embargo
In October 1973, the Organization of Arab Petroleum Exporting Countries (OAPEC) announced that it was implementing a total oil embargo against countries that had supported Israel at any point during the 1973 Yom Kippur War, which began after Egypt and Syria launched a…Source: Wikipedia (CC BY-SA)
Cycling
Activity of riding a bicycle
Cycling, also known as bicycling or biking, is the activity of riding a bicycle or other types of pedal-driven human-powered vehicles such as balance bikes, unicycles, tricycles, and quadricycles. Cycling is practised around the world for purposes including transport,…Source: Wikipedia (CC BY-SA)
Roller skating
Sport, activity, or form of transportation
Roller skating is the act of travelling on surfaces with roller skates. It is a recreational activity, a sport, and a form of transportation. Roller rinks and skate parks are built for roller skating, though it also takes place on streets, sidewalks, and bike paths.Source: Wikipedia (CC BY-SA)