Before Someone's Time Meaning

(idiomatic) From before one was born or old enough to be aware of the world.

Example: 2007, Bobby Braddock, Down in Orburndale: A Songwriter's Youth in Old Florida, Louisiana State University Press (2007), ISBN 9780807132227, page 55:
  At thirteen, I liked a lot of music that was before my time: Louis Armstrong and Dixieland jazz, Sousa marches, and barbershop quartet singing.
For more examples of usage of this term, see Citations:before someone's time.