So I was born in June during the "Spring Forward" portion of daylight savings time, which means that I do actually gain an hour of my "life time" every time the clocks get set back. Strange to think about, I suppose, and perhaps balanced out by various moves along timezones that I've made throughout my life that may actually have a net effect of reducing my "life time". Of course, this only makes sense if you actually keep track of your life by the time on the closest clock to you and not by the total number of hours (or minutes or seconds) that you are alive.
Not sure where I'm going with this, but if you take nothing else away: be sure to set your clocks back this evening so that you're well-prepared tomorrow (assuming that you live somewhere that this applies to you, of course)
Sundial picture from MaestroBen