Spring ahead

We get to spring ahead this weekend - Daylight Savings

Why do we still follow this seemingly bizarre practice of setting clocks ahead or back every six months or so?

I'm sure there was a very valid reason at one time in history, but is it really necessary now?  Why don't we just adjust a half hour and call it good?!  This is silly if you ask me - especially when areas in our own country refuse to participate.

Stop the madness!