Please note that the values used to calculate seasons are based on the default game settings. However, these figures are not always reliable due to an occasional rounding error with the Don't Starve game itself sometimes adding 1-2 days per year. This means the longer your game save has been going, the more likely you are to see discrepancies between your game and this page.
Information on the seasons was sourced from the Don't Starve Wiki.
You can read more about the Don't Starve Calendar Calculator here.