The Core Question
The global debate over daylight saving time has increasingly moved beyond "should we have DST?" to "should we eliminate clock changes entirely?" Three camps have emerged: those who want to keep changing clocks twice a year, those who want permanent daylight saving time (permanent summer time), and those who want permanent standard time.
Arguments for Permanent Daylight Saving Time
Permanent DST — keeping clocks one hour ahead of solar standard time year-round — appeals to many people for practical reasons:
- More evening daylight after work for outdoor activities, sports, shopping, and socializing.
- Reduced home lighting use in the evenings.
- Potentially lower rates of seasonal depression (SAD) due to more usable daylight hours.
- Economic benefits: extended daylight hours encourage consumer spending.
- Popular support in polls, particularly among urban and working-age populations.
Arguments for Permanent Standard Time
Permanent standard time — keeping clocks aligned with solar time year-round — is strongly preferred by the medical and scientific community:
- Standard time is better aligned with the sun and human circadian biology. Sunrise occurs at natural times, supporting morning alertness and hormone regulation.
- Under permanent DST, winter sunrise in northern cities can be pushed after 9:00 AM — dangerously late for school children and morning commuters.
- Sleep researchers and cardiologists overwhelmingly support standard time, citing evidence of better sleep quality, lower cardiovascular risk, and reduced mortality.
- The American Academy of Sleep Medicine, European Sleep Research Society, and World Sleep Society all recommend permanent standard time.
Arguments for Keeping Biannual Transitions
The status quo also has defenders:
- The current system has been in place for decades and systems (legal, financial, logistical) are adapted to it.
- Coordination challenges — especially within the EU — make unilateral permanent time adoption problematic.
- Some argue the health effects of transitions, while real, are manageable and temporary.
The Political Deadlock
Despite broad public support for ending clock changes, legislative progress has been slow globally. In the U.S., the Senate passed the Sunshine Protection Act (permanent DST) in 2022, but the House did not act on it. In the EU, the 2019 directive to end mandatory DST has not been implemented due to coordination failures. The gap between stated desire for change and actual policy change reflects the genuine complexity of coordinating time across interconnected economies.
What Experts Recommend
The near-universal recommendation from public health researchers is permanent standard time. The desire for evening light is understandable, but the circadian biology evidence is compelling: humans and other animals evolved under solar time, and deviating from it has measurable costs to health and wellbeing.