オールシーズン

noun

all seasons; year-round

Used as a noun to refer to something that spans or is suitable for all seasons.

• このリゾートはオールシーズン楽たのしめる。

  This resort can be enjoyed in all seasons.

noun which may take the genitive case particle 'no'

all-season; suitable for any season

Used as a prenominal modifier (with の) to describe items or facilities usable throughout the year.

• オールシーズンのタイヤを買かった。

  I bought all-season tires.