Clocks do not go back by 20 minutes as part of the standard time changes. Instead, the usual practice for daylight saving time changes is that clocks go back by one hour. For 2025, in the UK and much of Europe, clocks will go back one hour on Sunday, October 26, at 2:00 am, marking the end of British Summer Time and the return to standard time. In the United States, clocks go back one hour on Sunday, November 2, 2025, at 2:00 am, when daylight saving time ends and standard time resumes. No standard time change involves setting clocks back by 20 minutes; the shifts are always by one hour forward in spring ("spring forward") and one hour back in autumn ("fall back").