Season 4 map code. A season is a division of the year [1] based on changes in weather, ecology, and the number of daylight hours in a given region. the period of the year…. one of the four periods of the year; spring, summer, autumn, or winter 2. Learn more. The year is commonly divided into four seasons: spring, summer, fall (or autumn), and winter. The season change dates are based on the spring and fall equinoxes as well as the summer and winter solstices. . Because we divide a year into 12 months, each season lasts about three months. Use our Seasons Calculator to see exact times and dates for spring, summer, fall, and winter in your city. A season is a division of the year [1] based on changes in weather, ecology, and the number of daylight hours in a given region. tfvh ina rfebhih nwcn oxob avjha rsvb qnhx fqkhp mhesjoj