The knock-knock jokes are traced back to 1900. Yes! You heard it right, 1900. These jokes are now more than a century old and still making everyone laugh today.
Though, its origin is officially unknown.
It was Merely McEvoy, who recalled a style of joke from around 1900 where a person would ask a question such as “Do you know Arthur?”, the unsuspecting listener asking “Arthur who?” and the teller of the joke answering “Arthurmometer!”
In 1929, a variation of the format in the form of a children’s game was described.
In the game of Buff, a child with a stick thumps it on the ground, and the dialogue ensues-
What says Buff?
Buff says Buff to all his men, And I say Buff to you again.
In 1936, the standard knock-knock joke format was used in a newspaper advertisement. The joke was-
Rufus the most important part of your house.
The knock-knock catch phrase became popular in 1936. The famous joke of that time was
Edward Rex who?
Edward wrecks the Coronation.
The format was well known in the UK and US in the 1950s and 1960s. Knock Knock goes international in 1953.