When is Michigan's Longest Garage Sale event this summer? U.S. 12 from Detroit to New Buffalo

 For 2023,

the dates are Friday August 11, Saturday Aug. 12, and Sunday August 13

See this "Heritage Trail" dot-org explanatory web posting =

https://www.us12heritagetrail.org/event.asp?ait=ev&eid=1023&cid=2