We all know Woodstock, that legendary concert which took place in 1969.  Did you know there was another major concert taking place in Harlem at the same time? The Harlem Cultural Festival lasted for 6 weeks and included such performers as Nina Simone, Gladys Knight and Stevie Wonder.  Finally 50 years later, the documentary footage taken at the time is being released.  This is a concert and a time capsule you will not want to miss.