Something good is going to happen. Knock on wood. That's what we say, but why?
According to A Dictionary of English Folklore, authors Jacqueline Simpson and Steve Roud, the earliest known mention of the practice only dates to 1805. It appears to be linked to 19th-century children's games like "Tiggy Touchwood", types of tag in which children were safe if they touched something wooden.

Allyson Good curates senior living, health, and family content. She is formerly the Managing Editor of Active Life, a print newspaper published in 2016-2017 for seniors, choosing practical articles on health, money, safety, and everyday living for older readers. She is also an avid gardener and offers up Garden Hints and Tips on a regular basis.
