set the/(one's) clock(s) ahead(redirected from set the clocks ahead)
set the/(one's) clock(s) ahead
To advance the time on one's clock(s) ahead by one hour to account for the beginning of daylight saving time. Primarily heard in US. Don't forget to set your clock ahead tonight or you'll end up oversleeping tomorrow! I hate having to set the clocks ahead every spring, it's such an antiquated custom.