Clocks are typically turned back by one hour, not 20 minutes, when daylight saving time ends. In the United Kingdom, for example, clocks go back by one hour on the last Sunday of October, which in 2025 will be on October 26 at 2 a.m. In the United States, clocks go back by one hour on the first Sunday of November, which in 2025 falls on November 2 at 2 a.m. The practice of turning clocks back by one hour marks the end of daylight saving time and the return to standard time. The concept of changing clocks in increments other than one hour, such as 20 minutes, was historically proposed but is not used in current daylight saving time practices.
So, to clarify, currently, there is no standard practice or scheduled event to turn clocks back specifically by 20 minutes. Instead, clocks go back by one hour on the established dates in autumn depending on the region.
