Issue with summer as starting season

Unlike the start of other seasons, the proportion of the three time periods when summer is the start season is still affected by the previous season.For example, if the previous season was winter, it will gradually change according to the time period of winter,and the temperature is not the state in the middle of the season.

Also winter will last 20 days as the starting season instead of the normal 15 days (even at full default settings).