Daylight Saving Time

Tonight we have to adjust the clock forward one hour, we have to do that every years near the start of spring . And then in autumn we will adjusted the clock backward one hour. We did that,because in the summer's time the day' time is longer than the night's time, when we adjusted forward one hour so that afternoons have more daylight and mornings have less. There is same and the winter time. Because in winter the night's time is longer than the day's time, so we have to adjust the clock backward one hour.