The bottom line with Daylight Saving Time is you get more sunlight.
In reality, DST is an eight-month experiment designed to make life, well, more pleasurable for humans. The basic idea: In the Western world, we typically spend more awake time in the evenings than in the mornings. We also enjoy many benefits from being awake in the sunshine. This National Institutes of Health overview is a good place to read about vitamin D, increased exercise, increased socializing, and overall improvements to mental health that come with sunlight.