Hash Bash is an annual cannabis advocacy event held in Ann Arbor, Michigan, traditionally on the first Saturday of April. Originating in 1972, it takes place on the University of Michigan’s Diag and brings together activists, enthusiasts, and industry leaders to rally for cannabis reform, education, and awareness. The event features speeches from advocates, live music, and a vibrant atmosphere celebrating cannabis culture. Over the years, Hash Bash has grown into a major gathering, attracting thousands of attendees who support legalization, policy change, and the right to consume cannabis responsibly.