Use Main Maps to Analyze DST and Time Zones: "fixDST.com"
Daylight Saving Time is now the dominant time in the US. It is no longer solely a summertime experience. It exists for 65% of the year.
Shortened sleep, increased body weight, breast cancer, diabetes, heart disease, sleep disturbances, and mental & cognitive problems have been attributed to it. None of this was even imagined when Daylight Saving Time was initially created.
It is worthy of note that the 2017 Nobel Prize for Physiology/ Medicine was awarded for discoveries of mechanisms that control circadian rhythms. More than 50% of all gene expression is under circadian control.
I. Jeanes