time-honored
adjectiveUK /ˈtaɪmˌɒnəd/
US /ˈtaɪmˌɑːnərd/
Something time-honored is old and respected because people have done it or used it for a very long time.
Shaking hands is a time-honored way to greet someone.
OTHER MEANINGS
2. Accepted and trusted because it has been used successfully for many years.
The doctor used a time-honored method to treat the cold.
3. Honored or valued because of its great age.
The village kept its time-honored festival every spring.
4. Following old customs rather than new ideas.
He preferred the time-honored rules of the game.