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The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. Eastern Standard Time (EST) is five hours behind Coordinated Universal Time (UTC−05:00).
Time in Massachusetts, as in all US states, is regulated by the United States Department of Transportation. [1] Massachusetts is in the Eastern Time Zone (ET) and observes daylight saving time (DST).
Like the other five New England states, which also use the Eastern Time Zone, sunset in the winter in Rhode Island can occur as early as 4:30 p.m. Most of the New England states have considered using the Atlantic Time Zone without daylight saving to mitigate this.
Before the adoption of four standard time zones for the continental United States, many towns and cities set their clocks to noon when the sun passed their local meridian, pre-corrected for the equation of time on the date of observation, to form local mean solar time. Noon occurred at different times but time differences between distant ...
The evolution of United States standard time zone boundaries from 1919 to 2024 in five-year increments. Plaque in Chicago marking the creation of the four time zones of the continental US in 1883 Colorized 1913 time zone map of the United States, showing boundaries very different from today Map of U.S. time zones during between April 2, 2006, and March 11, 2007.
The Doomsday Clock will be updated today as a symbol of the threat from war, nuclear weapons and the climate crisis, as well as more new concerns such as artificial intelligence. It reached that ...
During part of the year, some portions of the zone observe daylight saving time, referred to as Atlantic Daylight Time (ADT), by moving their clocks forward one hour to UTC−03:00. The clock time in this zone is based on the mean solar time of the 60th meridian west of the Greenwich Observatory .
For $40 a year, those looking to have the grim news delivered can download the Death Clock, which will ask a series of questions about your health and social habits — helping it to predict not ...