Permanent time observation in the United States
Year-round standard time in the US
Permanent time observation in the United States
Establishing either permanent standard or daylight saving time (DST) eliminates the practice of semi-annual clock changes, specifically adjusting clocks forward by one hour from standard time to DST on the second Sunday in March (commonly called "spring forward") and back by one hour from DST to standard time on the first Sunday in November ("fall back"). The existing practice of switching the clocks twice a year is unpopular, with only about 20% of Americans preferring it. The Uniform Time Act of 1966 formalized the specification of time zones and the dates of DST observation in the United States. Prior to this law, time zones and DST observation in America were independent and erratic across states and cities. The law requires states to change clocks semiannually between standard time and DST on federally mandated dates, and it permits states to opt out of DST observation altogether and remain on permanent standard time, but does not permit observation of permanent DST. Arizona (with...
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