Rationale and original idea. The main purpose of Daylight Saving Time (called " Summer Time" in many places in the world) is to make better use of daylight. Mar 4, Sunday, March 11 marks the beginning of Daylight Saving Time (DST). Starting at 2 A.M., we move our clocks one hour ahead. It always begins. Mar 12, At 2 am on Sunday, March 11, daylight saving time began. We set our clocks forward one hour, and the change has pushed sunsets later into. Seal - Daylight Saving [AUDIO] Mar 11, Think you know why we have Daylight Saving Time? It's really about money and energy policy. Here's the scoop. Mar 6, Here are 10 fun facts about daylight saving time that you may not have known. Whether you savor the extra sunlight in the summer or dread the jarring time jump, Daylight Saving Time is inevitable (at least in most parts of the country).