"Critical Mass is a cycling event typically held on the last Friday of every month; its purpose is not usually formalized beyond the direct action of meeting at a set location and time and traveling as a group through city or town streets on bikes.

The first critical mass originated in 1992 in San Francisco. By the end of 2003, the social movement has being held in over 300 cities around the world." Wikipedia

Dates for 2019: Last Fridays from April to October

Follow latest updates here www.facebook.com/events/409897119811028/