The clocks go forward one hour in the spring and back one hour in the autumn. In the UK and most of Europe, this means:

• Spring: clocks move forward (forward one hour), commonly phrased as "spring forward." This starts British Summer Time (BST) and reduces the amount of overnight daylight.
• Autumn: clocks move back (back one hour), commonly phrased as "fall back" or "autumn back." This ends BST and reverts to standard time.

Key notes:

• In the UK: DST starts on the last Sunday in March (1:00 a.m. moving to 2:00 a.m., effectively losing one hour of sleep) and ends on the last Sunday in October (2:00 a.m. moving back to 1:00 a.m., gaining an extra hour).
• Globally, many countries use a similar pattern, but dates and naming conventions (BST, GMT, CET, etc.) vary by region.

If you’d like, I can tailor this to a specific country or current year and give exact dates.