From their event page: 

The Philadelphia Juneteenth Parade and Festival, started by the Pennsylvania Juneteenth Initiative, is the largest annual celebration in the nation attended by thousands where we join together to have fun, embrace our history and continue the tradition of Kujichagulia (self-determination).

The first Philadelphia Juneteenth Parade and Festival took place on June 18, 2016. This event drew an audience of 5,000 people, 2 floats, 15 units and 50 vendors with the parade ending and the festival occurring at the African American Museum at 7th and Arch. And as they say “The rest is history”.

Over the past 5 years, the parade has grown to be the largest in the nation drawing over 25,000 attendees to experience a culturally festive 1.5 mile long parade with over 2,000 participants and 20+ floats. The annual celebration continues with a festival at the historic Malcolm X Park with over 250 vendors and a musical concert for the entire family to enjoy