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Arizona has not been doing daylight savings for years, and they don't have this problem. Really any area with 350+ days of sun shine a year should abandon DLS.

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The day length changes less as you get closer to the equator. It's not nearly a big a deal in Tuscon as it is in San Francisco (or Eureka).

This is a great example of why local rule is generally preferable.

The difference is some people are talking about DST year-round (again). Arizona is never on DST.

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