Is this ok? Don’t hang out at deep night. It’s not safe.
I mean don’t hang out when it’s very late.

Thanks

Question

Is this ok? Don’t hang out at deep night. It’s not safe.
I mean don’t hang out when it’s very late.

Thanks

Answer

Hello, I have never heard the phrase 'at deep night'.  You could say 'Don't hang out deep in / into the night', though.

Answer

I think "hang out late at night" is what you're looking for