The spoken usage of "night" as a casual, common Edition of "good night" (wishing one particular a restful sleep) is popular, but I'm unsure what the proper published equivalent is - when there is one. I have normally utilised 'Night by having an apostrophe, ordinarily capitalized: By way of example, https://zanderwkwgr.tblogz.com/indicators-on-night-gangnam-퍼펙트가라오케-karaoke-guide-you-should-know-51157402