had an estimated 5,000 attendees. The 2015 Hash Bash had a record 8,000–15,000 attendees largely owing to the appearance of comedian Tommy Chong and was 2 hours long instead of the usual hour. In 2019, Michigan Governor Gretchen Whitmer recorded a video for Hash Bash attendees that celebrated the state's legalization of recreational cannabis. Said Whitmer, "We worked hard, we got it done, we made recreational marijuana legal in the state of Michigan." Whitmer also attended the event the previous year while she was running for governor. Recent and upcoming Hash Bash dates 2021: 50th annual - April 3 (virtual event due to coronavirus) 2020: 49th annual - April 4 (canceled due to coronavirus) 2019: 48th annual - April 6 2018: 47th annual - April 7 2017: 46th annual - April 1 2016: 45th annual - April 2 2015: 44th annual - April 4 2014: 43rd annual - April 5 2013: 42nd annual - April 6 2012: 41st annual - April 7 2011: 40th annual - April 2 2010: 39th annual - April 3 2009: 38th annual - April 4 2008: 37th annual - April 5 2007: 36th annual - April 7 2006: 35th annual - April 1 2005: 34th annual - April 2 2004: 33rd annual - April 3 2003: 32nd annual - April 5 References External links Annual Hash Bash - Ann Arbor, Michigan Freedom Activist Network's Guide To Ann Arbor Hash Bash Monroe Street Fair official site "Pro-pot event gets touch of Hollywood" - Geoff Larcom for the Ann Arbor News, April 8, 2007. Cannabis events in the United States Cannabis in Michigan Culture of Ann Arbor, Michigan Recurring events established in 1972 1972 establishments in Michigan 1972 in cannabis Spring (season) events in the United States