Citing a study published in OpenHeart, a press release issued by the American Heart Association stated there was an approximately 24% increase in heart attacks on the Monday immediately following daylight saving time. Researchers in Finland also reported an increased rate of ischemic stroke during the first 2 days after daylight saving time, according to a study published in Neurology.

https://www.healio.com/news/cardiology/20240308/aha-offers-tips-to-lower-impact-of-daylight-saving-time-on-heart-health#:~:text=Citing%20a%20study%20published%20in,immediately%20following%20daylight%20saving%20time.