What is "yesteryears"

Usage examples of "yesteryears".

The passing of the eons should have ended old impulses of hatred and destruction, On Earth, a thousand descendants of enemies of an equal number of yesteryears now lived side by side, at peace apparently forever.

And on many a long winter night in yesteryears, Tomlin or Petal had spoken of those bygone days, had told their buccoes and dammsels of the deeds of their namesakes, and of the monster they pursued.