The anniversary of a day that you came close to death. Very popular with military veterans. It is usually not celebrated openly, but serves as a day of reflection.
“My alive day is August 21. Three years ago in Belfast I was shot by a sniper and survived.”
To be ok. To be on activity. Often used to emphasize the good health of a person, or the recovery after an accident or a trouble situation. Also used for a conversation with a long old friend.
And its an answer for greetings.
where had you been? i handt seen you in a long time