What is the time period for Willy Wonka and Chocolate Factory?

The 2005 film Charlie and the Chocolate Factory is a modern adaptation of the classic children's novel of the same name by Roald Dahl and not Willy Wonka and the Chocolate Factory. Dahl's novel was first published in 1964 and is set in an unspecified time period, most likely the mid-20th century. The 1971 film Willy Wonka & the Chocolate Factory starring Gene Wilder is set in the same general time period as the book. The 2005 film stars Johnny Depp as Willy Wonka and is set in a somewhat futuristic time period, with advanced technology and modern fashion.