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Amentum Holdings, Inc. (formally Amentum Government Services Holding LLC) is an American government and commercial services contractor based in Chantilly, Virginia. [ 4 ] [ 5 ] The company was formed in 2020 from the spinout of AECOM's Management Services / federal group. [ 6 ]
The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2025a of the tz database. [2]
Founded in 1955 by Edward Shay, it is headquartered in Arlington, Virginia. For a time after 2016 it was owned by Platinum Equity until it became listed on Nasdaq in 2018. In February 2022 the company merged with Amentum Government Services Holdings LLC and its stock was delisted from Nasdaq. [6]
AECOM traces its origins to Kentucky-based Ashland Oil & Refining Company, which in turn grew out of Swiss Drilling Company, founded in Oklahoma in 1910 by J. Fred Miles. He gained control of some 200,000 acres and formed Swiss Oil Company in Lexington.
Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
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.
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From east to west, the four time zones of the contiguous United States are: Eastern Time Zone (Zone R), which comprises roughly the states on the Atlantic coast and the eastern two thirds of the Ohio Valley. Central Time Zone (Zone S), which comprises roughly the Gulf Coast, Mississippi Valley, and most of the Great Plains.