Put the/ clock back - Idioms by The Free Dictionary
put the/(one's) clock(s) back (redirected from put the/ clock back)
put the/(one's) clock(s) back
To adjust the time on one's clock(s) back by one hour to account for the end of daylight saving time. Don't forget to put your clock back tonight. I hate having to put the clocks back every autumn, it's such an antiquated custom.
put/turn the ˈclock back return to the past; return to old-fashioned ideas, customs, etc: Sometimes I wish I could turn the clock back to my days as a student. ♢ These new restrictions on medical research will undoubtedly put the clock back (by) 20 years.