Earth Milestones since First Earth Day View the interactive timeline
Daylight Saving Time
Most of the U.S. begins daylight saving time at 2 a.m. on the second Sunday of March and reverts back to standard time at 2 a.m. on the first Sunday in November. From 1966 to 2006, most of the U.S. observed daylight saving time on the first Sunday in April to the last Sunday of October.
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