date night

[ deyt nahyt ]
/ ˈdeɪt ˌnaɪt /

noun

an evening social date on which a married or long-term couple go out together: I enjoy a once-a-week date night with my husband.
a night of the week on which it is usual or customary for couples to go out on a date: Saturday night is date night.

Origin of date night

First recorded in 1905–10