The 2009 Ham Days is being promoted as the 40th anniversary of the festival, but the "first" Ham Days reportedly took place in 1971, according to news stories from that year. Confused? It isn't the first time.
The numbering of Ham Days has been in question for years, and the official and unofficial numbers remain something of a mystery.
Charlie Pearl wrote about the issue in 1994. "How do you count Hammiversaries?" was included in the preview of that year's Ham Days.