The practice of changing our clocks on the first Sunday of spring originated in industrialized countries to save energy. Daylight Saving Time was first instituted in Germany in 1900, and since then it has been adopted by many other nations. During the summer, when sunlight lasts longest, people could work outside during the morning hours and then take a break for lunch. By moving their clocks an hour forward, they would have more daylight at the end of the day so they could continue working in the afternoon. This difference in time led to an earlier sunrise and later sunset, which allowed people to work outside for longer periods of time without having toatoninightly sunburned.