"The guitar's alright as a hobby, but it won't earn you any money." -- John Lennon's Aunt Mimi (note: some sources attribute this to his mother instead)
[This QotD entry was originally scheduled to coincide with another anniversary, but a happier one than last Thursday: the first time the Beatles were played on the radio in the US ... but additional research turned up several competing claims in different parts of the country, most without dates in the citations I found, so I'm not really sure whether this is the anniversary of that or not.]