Clocks change twice a year for daylight saving time. In the UK, clocks go forward by one hour at 1 a.m. on the last Sunday in March, marking the start of British Summer Time (BST), and go back by one hour at 2 a.m. on the last Sunday in October, returning to Greenwich Mean Time (GMT).
Similarly, in many European countries including Poland, clocks go forward on the last Sunday in March and go back on the last Sunday in October. For example, in 2025, clocks in Poland will move back one hour on October 26 at 3 a.m., and will go forward one hour on March 29, 2026.
In North America, daylight saving time generally starts on the second Sunday in March and ends on the first Sunday in November.
Thus, the exact dates can vary by country and region, but the common practice is to move clocks forward in spring and back in autumn to make better use of daylight.
