When was Heigh-Ho created?

"Heigh-Ho" is a phrase, not a specific creation. It's likely it's been around for centuries, used as a greeting or exclamation in various contexts.

However, you might be thinking of its specific use in the Disney film Snow White and the Seven Dwarfs, which was released in 1937. The song "Heigh-Ho" in the movie features the dwarfs singing it while they go to work in the mine.

So, while "Heigh-Ho" itself has no specific creation date, its use in the context of Snow White and the Seven Dwarfs was in 1937.