Connecticut, along with Hawaii and most of Arizona, does not observe Daylight Saving Time (DST). The very simple reason is primarily related to geographical and energy usage factors. For Arizona, the decision to opt out of DST is largely to conserve energy. The state experiences extremely hot summers, and by not shifting the clocks, residents avoid having an extra hour of daylight in the evening which would increase the use of air conditioning and cooling systems, thus raising energy consumption.
Connecticut aligns with the rest of the northeastern states by observing DST; however, if referring specifically to states that legally can opt-out per the Uniform Time Act, Hawaii and Arizona (with exceptions such as the Navajo Nation) are the main states that do not change clocks. Other U.S. territories like American Samoa, Guam, and Puerto Rico also do not observe DST.
The continuation or abolition of DST remains a topic of political discussion and legislation, including efforts like the Sunshine Protection Act that aim to make DST permanent nationwide. Still, as of 2025, Connecticut continues to participate in the biannual clock changes while Arizona and Hawaii famously do not, for reasons tied to climate, energy savings, and regional convenience.
SOURCE
[1](https://www.indystar.com/story/news/2025/10/06/did-the-time-change-last-night-when-daylight-saving-time-ends-2025-dst-fall-back-one-hour-when-nov-2/86545134007/)
[2](https://timesofindia.indiatimes.com/world/us/daylight-saving-time-2025-when-clocks-fall-back-health-risks-and-everything-you-need-to-know-about/articleshow/124333339.cms)
[3](https://en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States)
[4](https://www.timeanddate.com/time/change/usa)
[5](https://en.as.com/latest_news/when-does-the-time-change-this-year-daylight-saving-time-2025-n/)
