Seasons: how long is your spring, summer, fall and winter?

By default fourteen days for every season, aging turned off.
However, when my story requires a unique climate, I may increase the span for a specific season, which would usually be either summer or winter.

I like taking it slow, but not too slow since this boy gets only so much playtime. I do age up my NPCs and my active sims if/ when the story requires it.