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The North American Central Time Zone (CT) is a time zone in parts of Canada, the United States, Mexico, Central America, and a few Caribbean islands. [1]In parts of that zone (20 states in the US, three provinces or territories in Canada, and several border municipalities in Mexico), the Central Time Zone is affected by two time designations yearly: Central Standard Time (CST) is observed from ...
East Tennessee, except Bledsoe, Cumberland, and Marion Counties: UTC−05:00 EST Eastern Standard Time UTC−06:00 CT Most of state: UTC−06:00 CST Central Standard Time Texas: UTC−06:00 CT Yes Most of state: UTC−06:00 CST Central Standard Time UTC−07:00 MT El Paso and Hudspeth counties: UTC−07:00 MST Mountain Standard Time U.S. Minor ...
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 ).
In Ireland, what Irish law designates as "standard time" is observed during the summer, with clocks turned one hour ahead of UTC. [ 3 ] [ 4 ] The SDT column shows the abbreviation used during the winter, even in Ireland, and the DST column shows the abbreviation used during the summer, which is "IST", where the "S" in "IST" stands for "Standard ...
They were introduced in different years based on local decisions. Michigan adopted Central Standard Time throughout the state effective September 18, 1885. [1] [2] [3] In 1915, Detroit changed to Eastern time to be on the same time zone as New York, [4] followed by most of the rest of the state in 1931. [5]
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.
In 1949, in a heated rural vs. city debate, the Indiana General Assembly passed a law to put all of Indiana on Central Standard Time and to outlaw daylight saving time. However, the law had no enforcement power, and it was largely ignored by communities that wanted to observe Eastern Standard Time. [4]
It is ultimately the authority of the secretary of transportation, in coordination with the states, to determine which regions will observe which of the standard time zones and if they will observe daylight saving time. [7] As of August 9, 2007, the standard time zones are defined in terms of hourly offsets from UTC. [8]