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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.
Railway time. Clock on The Exchange, Bristol, showing two minute hands, one for London time ( GMT) and one for Bristol time (GMT minus 11 minutes). Railway time was the standardised time arrangement first applied by the Great Western Railway in England in November 1840, the first recorded occasion when different local mean times were ...
Railroad managers tried to address the problem by establishing 100 railroad time zones, but this was only a partial solution to the problem. [2] Weather service chief Cleveland Abbe introduced four standard time zones for his weather stations, an idea which he offered to the railroads. [3] Operators of the new railroad lines needed a new time ...
The International Meridian Conference was a conference held in October 1884 in Washington, D.C., in the United States, to determine a prime meridian for international use. [1] The conference was held at the request of U.S. President Chester A. Arthur. [1] The subject to discuss was the choice of "a meridian to be employed as a common zero of ...
UTC−08:00 (Zone 4 or Northwest Zone) – State of Baja California. UTC−07:00 (Zone 3 or Pacific Zone) – States of Baja California Sur, Chihuahua, Nayarit, Sinaloa and Sonora. UTC−06:00 (Zone 2 or Central Zone) – Most of Mexico. UTC−05:00 (Zone 1 or Southeast Zone) – State of Quintana Roo. Time in Mexico. Chile.
The Pennsylvania Railroad ( reporting mark PRR ), legal name The Pennsylvania Railroad Company, also known as the " Pennsy ", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. At its peak in 1882, the Pennsylvania Railroad was the largest railroad (by traffic and revenue), the largest ...
Papua New Guinea: Had numerous plantation and mining railways, all closed by the early 1990s. Line from Lae to Vanimo proposed (see Transport in Papua New Guinea). 598 Rwanda: Had industrial lines, out of use since the 1990s. Lines to Uganda and/or Tanzania (see Isaka–Kigali Standard Gauge Railway) proposed 646 Saint Lucia: 662 Samoa: 882 San ...