<Li> Southwestern Indiana (Evansville Metro Area): <Ul> <Li> Gibson </Li> <Li> Perry </Li> <Li> Posey </Li> <Li> Spencer </Li> <Li> Vanderburgh </Li> <Li> Warrick </Li> </Ul> </Li> <Ul> <Li> Gibson </Li> <Li> Perry </Li> <Li> Posey </Li> <Li> Spencer </Li> <Li> Vanderburgh </Li> <Li> Warrick </Li> </Ul> <P> Since April 2, 2006, all counties in Indiana observe daylight saving time . </P> <P> The most extensive study of time zone history in Indiana has been published in The American Atlas (1978) by Thomas G. Shanks, where the author identifies 345 areas in the state with a different time zone history for each . </P>

What parts of indiana does not change time
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