This article lists notable points in the history of Calvin and Hobbes. Note that date formats are DD/MM/YYYY.
- 18/11/1985: Calvin, Hobbes and Calvin's father make their first appearances in the first strip.
- 21/11/1985: First appearance of Miss Wormwood and Calvin in school.
- 23/11/1985: First Sunday strip, Calvin worries about monsters, possibly the first mentioning of Calvin's mother.
- 25/11/1985: The monsters speak under the bed for the first time; Calvin threatens to use a flamethrower.
- 26/11/1985: First appearance of Calvin's mother and the car.
- 27/11/1985: First appearance of Calvin's sandbox.
- 28/11/1985: First appearance of the running gag "gross dinners", alternate strip in some newpapers.
- 29/11/1985: First appearance of Spaceman Spiff, Calvin going to Mr. Spittle's office.
- 30/11/1985: Calvin and Hobbes take their first wagon ride.
Work in progress.