Daylight saving time clock changes do not increase heart attack rates

A large study found daylight saving time clock changes do not increase heart attack rates or worsen in-hospital outcomes. Researchers analyzed over 168,000 patients, concluding that the lost or gained hour is unlikely to trigger acute myocardial infarction in contemporary care. Previous concerns about DST impacting heart health may be outdated, though other risks like traffic accidents and sleep health warrant further study.