When did they decide to have day light saving time, who came up with the idea, and do all the states & cities in the U.S follow it? Do any other countries do this?

Here Is q list of other countries.

http://webexhibits.org/daylightsaving/g.html

Here Is a site all about daylight saving history

http://webexhibits.org/daylightsaving/b.html


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Hawaii, Arizona, and parts of Indiana do not observe daylight savings time.