Conversation so far:
What happened with The Monkees television series?
In assigning instruments for purposes of the television show, a dilemma arose as to which of the four would be the drummer.
How long did the dilemma about who will be the drummer for purposes of the television show last?
Dolenz was assigned to become the drummer. Tork taught Dolenz enough for him to fake his way through filming the pilot, but he was soon taught how to play properly.

Question: When did they officially have a concert and went on stage?
Self-contained rewrite: When did The Monkees officially have a concert and went on stage?