Every year Prescott, Arizona hosts the biggest Earth Day celebration in Yavapai County. The downtown Earth Day Celebration event is scheduled For April 19th, 09:00 am - 02:00 pm. Lining the courthouse square along Cortez Street you'll find booths and learning from all kinds of organizations, an even bigger child & youth area with hands-on projects & play, snacks for children, firefighters & waste management experts, and freebies all around-- Prescott is the place to be for Earth Day in Arizona. Escape the desert heat, meet new people, connect with inspiring local businesses and organizations, and join the international movement for our water, our wildlife, and our way of life. Here, in Prescott, Arizona.