Definition of put the clocks back (or forward) in US English:

put the clocks back (or forward)

phrase

  • Adjust clocks or watches backward (or forward) to take account of official changes in time.

    • ‘I have put my clocks forward, apart from the three that are radio-controlled and should look after themselves.’
    • ‘Don’t forget to put your clocks back tonight.’
    • ‘We put the clocks forward a couple of days ago, it's British summertime.’
    • ‘Western Australia has started putting their clocks forward over the last two summers.’
    • ‘It's October 27th, and three days before we put the clocks back.’