Despite popular myths, Tennessee does observe Daylight Saving Time—it’s not one of the exceptions. The two states with a very simple reason for not switching clocks are Arizona and Hawaii: both have warm climates where more daylight in the evening would only make people run air conditioners longer, increasing energy use—not saving it.
Who Doesn’t Do Daylight Saving?
Arizona:
Most of the state (except the Navajo Nation) has opted out since 1968, to avoid longer, hotter afternoons and higher cooling costs.
Hawaii:
Far southern latitude means little variation in daylight; DST serves no practical purpose, so Hawaii never changes its clocks.
Why This Is So Simple
In both places, extra evening daylight makes daily life less pleasant (hotter, more expensive), so their legislatures voted to stay on standard time year-round—no clock changes required.
U.S. territories (Puerto Rico, Guam, American Samoa, Northern Mariana Islands, U.S. Virgin Islands) also skip DST for similar daylight and climate reasons.
Tennessee’s Status
Tennessee fully observes DST like most other states and changes clocks twice a year.
Only Arizona and Hawaii skip Daylight Saving Time in the U.S., simply because it would make their hot evenings even hotter and less energy-efficient.
SOURCES
(https://economictimes.com/news/international/us/daylight-saving-time-2025-start-date-time-change-impacts-usa/articleshow/118763323.cms)
(https://en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States)(https://www.timeanddate.com/time/change/usa)
(https://www.yahoo.com/news/article/daylight-saving-time-2025-what-is-it-why-do-we-fall-back-in-november-and-why-is-it-still-considered-controversial-200554903.html)(https://en.wikipedia.org/wiki/Daylight_saving_time_by_country)
