Daylight Saving Time Linked to Increased Health Risks

Research and health analyses highlight that the twice‑year clock change disrupts sleep and circadian rhythms, producing measurable health impacts. In the week after the spring "forward" shift, heart attack rates rise by about 24% on the following Monday, motor‑vehicle fatalities increase by roughly 6%, and mental‑focus declines lead to more workplace errors. The same sleep loss contributes to heightened anxiety, mood swings, and overall reduced alertness.

A separate study of more than 12.6 million health records found that retinal vascular diseases also respond to daylight‑saving transitions. In the weeks after the spring shift, the risk of proliferative diabetic retinopathy and neovascular age‑related macular degeneration rose by about 30%. Conversely, the fall shift was associated with a 20% drop in retinal vein occlusion incidence. Researchers attribute these patterns to the metabolic stress of losing an hour of sleep and the subsequent inflammatory responses.

These findings reinforce calls for reconsidering the practice, given its broad implications for cardiovascular, ocular, and mental health.