be before somebody's time

be before (one's) time

To predate one's tenure or birth. A: "Have you ever seen this show?" B: "No, sorry, it's before my time." I don't know how that project was organized—it was before my time at the company.
See also: before, time
Farlex Dictionary of Idioms.

be before somebody’s ˈtime

be before the period that a person can remember or was involved in: The Beatles were a bit before my time. There used to be fields behind this house, but that was before your time (= before you started living here).
See also: before, time
Farlex Partner Idioms Dictionary
See also:
  • be before (one's) time
  • before (one's) time
  • before time
  • be in (one's) good graces
  • be in somebody's good graces
  • be in someone's good graces
  • go down as (something)
  • at the end of (one's) fingertips
  • at (one's) doorstep
  • at doorstep