Well, looking at the name - daylight savings time - also suggests another reaosn for it. In the summer, with the longer days, having an 'extra' hour allows people who work in the outdoors, or in areas which rely on natural light, a little more time to work: it's light enough in the mornings anyway, and 7pm is a lot brighter at DST than it is regular time. This is pointless in winter, however, when the sun sets around 4pm standard time anyway, and people would be coming into work before the sun rose... jonthecelt