well, it's not needed in the sw and personally, i hate it. hate when the sun sets at 4:30 in the afternoon during the winter and in the north it wouldn't set until after 9...was hell for going to drive-ins! and the only reason vegas observes it is because we don't want to mix up all the california people coming to visit...or so i'm told. another good reason to live in arizona...not observed at all there (most of indiana too).