Unless you have clocks that automatically adjust (I have one plus my iPhone), you have to manually set them ahead by one hour. For me it means adjusting my ship’s clock, assorted timers, and watches. We loose one hour of sleep so we can claim to get more sunlight during spring and summer. Farmer’s hate it (screws up the morning schedules in a big way) and a few states do not follow it. Alaskans hate it because during the summer the sun is out all the time (no real nightfall). Arizona (except the Navajo reservation),Hawaii,Michigan,and U.S. Territories (American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the Virgin Islands)do not observe daylight savings time.