Is there any formal salutation to greet someone when you meet them at night? A prefix such as 'Good' with morning, afternoon and evening works well but implies altogether a diferent meaning when used with night. To be specific, what can be prefixed with night here or any better way of 'greeting' will also work.

Is there any formal salutation to greet someone when you meet them at night? A prefix such as 'Good' with morning, afternoon and evening works well but implies altogether a diferent meaning when used with night. To be specific, what can be prefixed with night here or any better way of 'greeting' will also work. P. S:-Informal greetings like hello and hi won't work here.