A greeting used in long distance online friendships and live streams, to include both the "good morning" for the person who just woke up, and the "good night" for the person who's about to go to sleep, when they're on opposite time zones. Often used in online friendships between the Americans and Europeans.
Irish: "Top o' the mornin' to ya lad!"
American: "Yo man I'm about to hit the sack"
Irish: "Ay, that's alright... Good mornight!"