Conversation so far:
Where are Jerry Garcia's ancestors from?
Jerry Garcia's ancestors on his father's side were from Galicia in northwest Spain.
Where else are his ancestors from?
His mother's ancestors were Irish and Swedish.
What was his fathers name?
Jose Ramon "Joe" Garcia.
what was his mothers name?
Ruth Marie "Bobbie" (nee Clifford) Garcia.
Where was he born at?
He was born in the Excelsior District of San Francisco, California.

Question: What date was he born on?
Self-contained rewrite: What date was Jerry Garcia born on?