Usage patterns
季節が変わるthe season changes
It's about time for the season to change.
〈物〉の季節the season for something
It'll soon be cherry blossom season.
季節を問わずregardless of the season
This jacket can be worn regardless of the season.
季節に合わせるto match/suit the season
I choose clothes to match the season.
今が季節だit's currently in season
Mandarin oranges are in season right now.