Metropolitan France uses Central European Time (CET, UTC+1) in winter and Central European Summer Time (CEST, UTC+2) in summer — the same timezone as Germany, Spain, Italy, and most of continental Europe.
DST in 2025: clocks spring forward at 2:00 AM on Sunday 30 March and fall back at 3:00 AM on Sunday 26 October, aligned with EU rules. Despite being geographically close to the Greenwich meridian (UTC+0), France moved from GMT to CET in 1940 and has remained there since.
France's overseas territories use entirely different offsets: French Guiana (UTC−3), Martinique and Guadeloupe (UTC−4), Réunion (UTC+4), Mayotte (UTC+3), New Caledonia (UTC+11), and French Polynesia (UTC−10 to UTC−9:30). These territories do not observe DST.
During CET, Paris is 1 hour ahead of London (GMT), 6 hours ahead of New York, 7 hours behind Tokyo, and 4.5 hours behind Mumbai. Paris is often used as the European scheduling reference alongside London for global meetings.