A few years ago I was against changing the time but now I tend to even suggest a full two hour change! In the developed northern hemisphere the summer/winter daylight difference is huge (about 2 hours in the morning and 2 in the night) with a short time of equal length. Maximizing sunlight exposure while the people are outside is vital, mainly for psychological purposes. That means let the light begin at about 7-8 all year long and let summer afternoon extend as much as possible. No kid leaves home before 8 and the 6-in-the-morning drivers will pay attention all year long and not only during the winter. But all types of people will enjoy the long summer afternoons.