Check what time a shop is open, and, as many shops and facilities close on a designated day each week, which day it' s closed.
時間 jikan (time; hour)
営業時間 eigyō jikan (business hours)
24時間営業 nijūyojikan eigyō (open 24 hours)
Key character: 休 kyū (holiday; rest)
定休 teikyū (regular holiday)
定休日 teikyūbi (closed on [day of the week])
E.g. 定休日：日曜日 Teikyūbi: Nichiyōbi (Closed Sundays)
無休 mukyū / 定休日：なし teikyūbi: nashi / 年中無休 nenjū mukyū (no regular holiday, open 365 days a year)
↑お知らせ o-shirase (notice)
makoto ni katte nagara maishū doyōbi wo, teikyūbi to sasete itadakimasu (Though very selfish of us, we will be closed every Saturday)
*勝手ながら katte nagara (though selfish)
Often used apologetically when notifying someone of an action or decision that might displease or inconvenience them.