Just cuz I think some people are never sure what refers to what. DST, Daylight Savings Time, is the time in the summer where clocks are 1 hour ahead, so sun is at its highest point at 1pm instead of noon. You get more daylight in the evening hours as a result.
The time switch in the winter is switch to Standard Time, where the sun is highest at noon (this is the "normal" time society had before DST was invented, hence why it's Standard), you get more sunlight in the morning but the sun sets earlier in the evening.
If you're in North America, for the last 15 years, DST has been the main time (8 months of the year vs 4 for ST).