phrase
C1
Not usually available at that time.
Strawberries are out of season at the moment.
イチゴは今シーズン外です。
C2
During a period of the year when few people are there.
I prefer to travel out of season.
私はオフシーズンに旅行するのを好みます。
translation
旬ではない, オフシーズン