Indiana is an unusual case--part of the state is in the Eastern Time Zone, and part of it is in the Central Time Zone. The division runs along County lines. In the winter, therefore, there are two times used in different parts of Indiana. But in the summer, the Central Time part of the state goes an hour ahead to Daylight time, while the Eastern time portion of the state stays on Standard time, which means effectively that it's the same time no matter where you are in the state.

Arizona, which aligns with its neighbors to the East and North with Mountain Standard Time in the winter, joins the same time zone as all the tourists from California in the summer, since it continues to observe Mountain Standard Time, which is identical to Pacific Daylight Time.

The other state that doesn't "do" Daylight Time is Hawaii, but they're so far away from everybody else, and everyone arriving in Hawaii has to reset their watch anyway, that they don't need to pay no never-mind to this Daylight Time nonsense.

Then there's Double-Daylight Time, where everyone moves TWO hours ahead of standard time, a system I've heard of in some summer camps and the Soviet Union. But that's a whole 'nother problem.

--Charlie Baum