Original 1st printing 8&1/2 x11" hand-colored event flyer for the April Fool's Day Be-In, held in Rock Creek Park in Washington, DC on 4/1/1967.
Artist unknown/not credited, thin flat stock flyer is in excellent (B+) condition; aside from the aforementioned hand-coloring, there is just a VERY light amount of handling wear and a slight tape pull on the reverse top margin, otherwise it is a GORGEOUS example of this EXTREMELY uncommon early hippie event flyer from Washington DC.
While I couldn't find any specific information on this event, it appears to be similar to other "Be-In"/"Love-In" events held in New York City, Detroit and Los Angeles the same month.