Hawaii and Arizona (except for the Navajo Nation) do not observe Daylight Saving Time.
Cultures throughout history have adjusted time measurement to maximize the use of daylight and increase productivity. Versions of Daylight Saving were adopted in Europe and America with the growth of railroads and the industrial age in the 1800s.
Daylight Saving Time became permanent in the United States in the 1970s.
Real ways to save energy. Though research disputes energy savings by changing clocks, here are several ways to save energy at home year round.
- Replace incandescent light bulbs with fluorescent or Light Emitting Diode, LED bulbs. These bulbs, especially LEDs, use a fraction of electricity compared to incandescent. LED bulbs are more expensive, but a household switch can save an average $8 per month in electricity, recovering the expense of the change within a year. LED bulbs last up to ten years, compared to incandescent bulbs with a one-year life.
- Check attic insulation. Insulation should be 14 inches deep in southern states, and 18 inches if you live in the northern tier. In winter, heat in the home tends to rise through the ceiling and the attic. In summer, outdoor heat tries to penetrate living areas. Good insulation keeps heat where it should be.
- Install a smart thermostat to schedule temperature levels by a phone app.