Seasons will affect the environment (And in turn, the player) in various ways. Each season will last 5 in-game days.

Early Spring - Temperature: 50%
Mid Spring - Temperature: 75%
Late Spring - Temperature: 100%
Early Summer - Temperature: 100%
Mid Summer - Temperature: 125%
Late Summer - Temperature: 150%
Early Autumn - Temperature: 125%
Mid Autumn - Temperature: 100%
Late Autumn - Temperature: 75%
Early Winter - Temperature: 50%
Mid Winter - Temperature: 25%
Late Winter - Temperature: 25%

The grass/foliage color will also change with seasons, having a bluer tint in spring, a yellower tint in autumn, and a grayer tint in winter. Summer will have the default grass/foliage colors.

Crops will die in winter if they are not kept warm with a heating coil, and will not be able to be planted again until spring.

A season clock will be added to show the season cycle. Additionally, a season sensor that emits a redstone signal when it's the season it's set to will be added.