HIERO DAY is a one day event, combining an outdoor festival, concert, food, and block party where thousands come to celebrate all that is good about Oakland. September 7, 2015 in Downtown Oakland.
This community event brings together all ages and backgrounds. The event hosts a childrens area, multiple stages to host local and internationally renowned artists and DJs providing continuous entertainment from Hip-Hop, Jazz, Electronic, Alternative and R&B.
More information here