I have severe scoliosis. Pot is the only non-addicting option open to me. Legalize it completely.

Spring starts on March 21 with the Spring equinox; and ends on June 21 with the Summer solstice

I would guess, and it is just a guess, but I believe evening starts when the sun dips below the horizon. There is still daylight left but you are aware that the day is ending.

I think it's a good thing, It gives us longer evenings in the summer when the daylight stays with us more hours. However it makes sense to go back to standard time in the fall and winter so children don't have to walk to school in the dark in some parts of the country. The notable exception being Alaska where the kids always have to walk to school in the dark in the fall and winter. I imagine even the switch to anchorage standard time from pacific standard time (turned back the clocks yet another hour in the 'panhandle') has only shortened the time the kids must walk in the dark. Sorry for such a long winded answer to such a short winded question; it's been a long time since 'ask jeeves'