The Dayton Hamvention is an amateur radio convention (or hamfest), generally considered to be the world's largest hamfest. It is held each May in the Dayton, Ohio area. Starting in 2017, it will be held at the Greene County Fairgrounds in Xenia, Ohio near Dayton. Prior to this it was held each May at the Hara Arena in Trotwood, Ohio. Hara Arena has been the home of Dayton Hamvention since 1964, but the convention has been held since first held Saturday, March 22, 1952 at the Biltmore Hotel (QST March 1952). Hara Arena announced its closure in 2016 with the Hamvention being forced to move as a result. The Hamvention offers forums, exhibit space and a flea market and usually claims to have over 20,000 visitors (25,621 in 2015). Many amateur radio enthusiasts go out of their way to attend the Hamvention, travelling from all over the United States, Canada, Mexico and various parts of the world and even as far as Australia, Japan and Russia.