turn back the clock

/T ER1 N B AE0 K DH AH0 K L AA0 K/
verb
  1. 1

    To return to a previous state.

    โ€œWe had a terrible year so we agreed to turn back the clock and go on as if it hadn't happened.โ€

Source: https://en.wiktionary.org/wiki/turn%20back%20the%20clock