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(British) daylight saving time

Daylight saving time regions:   Northern Hemisphere summer   Southern Hemisphere summer   Formerly used daylight saving   Never used daylight saving

(British) daylight saving time

When DST observation begins, clocks are advanced by one hour during the very early morning.

(British) daylight saving time

When DST observation ends and standard time observation resumes, clocks are turned back one hour during the very early morning. Specific times of the clock change vary by jurisdiction.