noun
gallery opening hours
Refers to the hours during which an art gallery or exhibition space is open to the public.
開廊時間は午前10時から午後6時までです。
The gallery opening hours are from 10 a.m. to 6 p.m.
開館時間 is used for opening hours of a public facility like a library or museum, while 開廊時間 specifically refers to a gallery.
Compound of 開廊 (gallery opening) and 時間 (time, hours).