Happy birthday, Muiriel! - Hyvää syntymäpäivää, Muiriel!
Happy birthday, Miss Aiba! - Hyvää syntymäpäivää, neiti Aiba!
Said or written to a person who is celebrating his or her birthday in order to convey the good wishes of the speaker or writer (literally, "may you have a happy birthday")
When Charlotte entered the room, everybody yelled, happy birthday!.
Our version of the copyrighted song was, "Betsy, Joey, Mikey, Bobby/Happy birthday to you " Poor Mary, being the youngest, was finally included as an afterthought: " /And Ma-ary too "