Answer:
Hawaii is relatively close to the equator with minor changes to daylight because of season. Daylight savings would complicate international business and tourists, with no added benefit.
Arizona has determined the twice a year time changes complicate business operations without energy savings or any other benefit. Energy loss may actually occur because of increased use of residential air conditioning.
Overall, daylight savings are not uniformly observed internationally. Most countries do not observe daylight saving time as the US does. Countries that observe daylight saving time do not all change their clocks on the same days or time. Operating on standard time and ignoring daylight saving time simplifies transactions in the global economy.