Sleep scientists are cautioning against British Columbia’s move to make daylight saving time permanent, citing potential negative impacts on health, particularly for children. Myriam Juda, a sleep researcher at Simon Fraser University, emphasized global concerns over the health and safety implications of this decision, advocating instead for permanent standard time. The shift to permanent daylight time in B.C. will take effect this weekend, eliminating future clock changes.
Critics, including Jamie Zeitzer from Stanford University, question the health implications of the change. Zeitzer’s research, referenced by the B.C. government, highlights concerns about disrupting circadian rhythms and the importance of morning light exposure in regulating sleep-wake cycles. The adjustment could lead to challenges in melatonin release timing, affecting alertness and fatigue levels, particularly in teenagers with naturally later sleep patterns.
The transition to permanent daylight time, especially impactful in cities like Vancouver and Victoria due to dark winter mornings, raises concerns about reduced morning light exposure and potential sleep disturbances. Juda estimates that most British Columbians may lose nearly half an hour of sleep each night. Additionally, the shift may contribute to “social jet lag,” impacting overall well-being and potentially leading to various health issues over time, as highlighted by Zeitzer’s team research.
While public support for permanent daylight saving time was high during consultations, limited options were presented, with permanent standard time not considered. The government cited safety benefits and increased outdoor activity time as reasons for the change. However, concerns remain about the lack of scientific consensus supporting the move to permanent daylight time over standard time. Zeitzer emphasizes the importance of aligning with peer-reviewed health research and considering all potential health impacts before implementing such changes.