Daylight Savings Explained

I always appreciate the extra hour of sleep I get when we switch from daylight savings to standard time, although it's a bit shocking in the following days when it gets dark "so early". Now that the the switch is well past, and we're heading into the shortest days of the year, it's usually dark before I leave work. On days like this, I sometimes hope that the day will come when we are on daylight savings all year. Though I think I should put that hope behind me. I've just discovered that being on daylight savings all year would be a very bad idea.