Daylight saving time transitions, specifically losing an hour in the spring, are associated with a 24% relative increase in heart attacks the following day.

“Evidence shows that this coming Monday, there will be a ~24% spike in heart attacks from disrupted sleep and increased stress due to day light savings.”

“does this effect last for two or three days so there is a blast radius to it that you can see it that it's better but still worse in the spring which is where you lose that hourly the effect is still worse on the the second day and it's almost recovered by the third day and finally comes back to what looks like a baseline by about day four”

“what we've seen is that in the spring when we lose an hour of sleep there is a subsequent 24 relative increased risk for heart attacks that following day”

“in the fall when we gain an hour of sleep opportunity there is a 21 reduction in heart attacks that follow”