noun which may take the genitive case particle 'no', noun
open every day; open year-round; 365 days a year
Used for businesses or facilities that operate without regular closing days, including weekends and holidays. Often seen on signs or in advertisements.
このコンビニは年中無休で営業しています。
This convenience store is open every day of the year.
年中無休のジムを探
I'm looking for a gym that's open 365 days a year.