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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]
Before time zones were introduced, every place used local observation of the sun to set their clocks, which means they used local mean time, every city different based on their longitude. Detroit used 05:32:11 west of Greenwich and Menominee 05:50:27 west of Greenwich. Time zones were introduced in the United States in 1883.
Standard time in the contiguous United States, illustration 1903. 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.
Some U.S. time zones, such as the Samoa Time Zone, are not on this map. This is a list of the time offsets by U.S. states, federal district, and territories. For more about the time zones of the U.S. see time in the United States. Most states are entirely contained within one time zone. However, some states are in two time zones, due to ...
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.
4 March 2024: Source: Outline based on the map by the U.S. Central Intelligence Agency (CIA). Time zone information based on the Time Zone Database by the Internet Assigned Numbers Authority (IANA). Author: Heitordp
2024 South American wildfires. 2024 Brazil wildfires. The estimated area burned by wildfires in Brazil this year reaches 37.6 million hectares (93 million acres), an area larger than the size of Germany and more than double the yearly average from 2012–2023. (Financial Times) 2024 European floods
September 2024 sports events in the United States (1 C, 40 P) Pages in category "September 2024 events in the United States" The following 30 pages are in this category, out of 30 total.