休館日 (きゅうかんび) Japanese meaning | KotomoraUsage patterns
〈場所〉は休館日だa place is closed (on its regular closing day)
The library is closed today.
休館日を確認するto check a facility's closing day
I checked the museum's closing day before going.
本日は休館日ですtoday is our closed day (common sign phrase)
A sign at the entrance said, "Today is our closed day."