Mild Season (also known as Calm Season) is a Season from the Shipwrecked DLC. It is equivalent to Autumn. In Mild Season, the days are long at the beginning and middle of season but then get shorter during the last third of the season with nights becoming longer. Mild season is indicated by saturated color scheme. It is the default season in which a player begins the game, and lasts 21 days. When following previous Dry Season, the first day still has intense Volcano eruptions. Strong Winds and Rain can occur during the second half of mild season, but are far less severe and less frequent than the events that will occur during Hurricane Season.
Due to lack of Overheating, Flooding and other hazards, Mild Season is the best time to explore, gather resources and and prepare for other seasons, especially Hurricane Season. Due to long days and low frequency of rain, Sanity is usually relatively easy to maintain.