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 Jerry Garcia's ancestors from besides Galicia in northwest Spain on his father's side?
Jerry Garcia's mother's ancestors were Irish and Swedish.
What was Jerry Garcia's father 's name?
Jerry Garcia's father's name was Jose Ramon Joe Garcia.
what was Jerrry Garcia's mother's name?
Jerry Garcia's mother's name was Ruth Marie Bobbie née Clifford.
Where was Jerry Garcia born?
Jerry Garcia 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?