Permanent Daylight Saving Time Poses Challenges for Schools and Sleep

Proposals and decisions to end seasonal clock changes in favor of permanent daylight saving time have been adopted in several Canadian regions. While proponents cite benefits like increased evening daylight and alignment with other areas, experts warn of potential sleep disruption and health risks.

Because winter days are short in northern regions, dawn will occur later than many school start times. Communities located further north and west within time zones will experience sunrises after 8 a.m. or even 9 a.m. for a substantial portion of the school year, with some locations seeing sunrises past 10 a.m. in December and January.

This shift creates social jetlag, a mismatch between internal body clocks and rigid school or work schedules. Experts indicate that later dawns and delayed sunsets can lead to reduced overall sleep, raising concerns for health issues such as depression and cardiovascular disease.

Adolescents are particularly vulnerable to these changes due to biological shifts that make them naturally fall into later sleep chronotypes. Misalignment with early school start times can exacerbate sleep deprivation, leading to heightened risks for daytime sleepiness, attention deficits, and academic struggles.