The perennial debate over daylight saving time (DST) in France has resurfaced, as the country remains out of sync with its natural solar time. France currently operates on Central European Time (CET, UTC+1) in winter and switches to Central European Summer Time (CEST, UTC+2) from the last Sunday in March to the last Sunday in October, following a European Union directive.
Critics, including some politicians and health experts, argue that the permanent summer time adopted by the EU in 2019—a measure France was set to follow before its implementation was postponed—exacerbates a chronic misalignment. Metropolitan France's geographical positioning dictates that solar noon occurs approximately one hour later than its time zone suggests, a discrepancy worsened by DST.
Studies cited in the debate, including a 2019 European Parliament briefing, link the time changes to negative health outcomes such as increased heart attack risks and sleep disturbances. Proponents of ending the bi-annual shift often advocate for adopting permanent standard time to better align with natural light cycles.
The broader EU-wide discussion remains stalled, leaving member states like France unable to unilaterally make a permanent change without potentially disrupting the single market. Consequently, the seasonal clock change continues, maintaining the dissonance between the country's official time and its solar reality.
