This seems to have been rescheduled, June 21st is the correct date.

Meet at Tina Hills Pavilion in Bayfront Park
Sunday June 21st @ 9am

"Bike Miami Summer Rides are free, family-friendly group rides that will explore a new Miami neighborhood each month. Starting on Sunday, June 21 in Downtown/Little Havana, Bike Miami Rides will offer Miami residents an opportunity to learn the rules of the road and enjoy a fun, relaxed, weekend group ride! You’ll ride with officers from the City of Miami Police Bike Unit and volunteers, as well."

Get all the details @ Bike Miami Days