timeworn (adj.)
That has been practised or adhered to for a long time; old, ancient.
1840 It is not only a time-worn custom with the Spaniards and Portuguese, but is a frequent practice in parts of our own southern states.
Around World vol. I. v. 612006 The more graceful and timeworn tradition of the Southern plantation house. E. Coffman, Alone in Dark v. 39 [OED]
However, in other contexts timeworn can mean hackneyed.