https://www.realnatural.org/do-daylight-savings-changes-have-negative-health-effects/
“...Heart attacks increase with transition to daylight savings
Researchers from the William Beaumont Hospital in Michigan conducted a study that monitored the incidence of heart attacks – myocardial infarctions to be precise – between 2006 and 2012. The study population ended up being 935 patients, about 60/40 men to women.
They found that while there was little increase in heart attacks during the fall – even slightly lower – there was a major spike in heart attacks the day after the spring time change (spring forward) to daylight savings time.
The number of heart attacks the day after the spring time change vaulted 71 percent over the average incidence numbers.
For the rest of the first week after the time change, heart attack incidence averaged an increase of 17 percent higher than the average incidence rate for heart attacks...”