Every year, numerous countries change their clocks at different points in the year, causing scheduling issues and other annoyances.
The table linked here shows which countries change at what times, and also shows that numerous countries do not observe DST; http://en.wikipedia.org/wiki/Daylight_saving_time_by_country
California has asked for year round DST before.
The wonderful folks over at Standard Time have created a decent proposal for a two time zone system; http://www.standardtime.com/proposal.html.
There are several ways to accomplish it, but however you look at it, it is time to Stop The Time Change.