Tennessee is a state located in the southeastern region of the United States. Tennessee is the 16th most populous of the 50 United States. Tennessee is bordered by Kentucky to the north, Virginia to the northeast, North Carolina to the east, Georgia and Mississippi to the south, Arkansas to the west, Missouri to the northwest; the Appalachian Mountains dominate the eastern part of the state, the Mississippi River forms the state's western border. Nashville is the state's capital and largest city, with a 2017 population of 667,560. Tennessee's second largest city is Memphis, which had a population of 652,236 in 2017; the state of Tennessee is rooted in the Watauga Association, a 1772 frontier pact regarded as the first constitutional government west of the Appalachians. What is now Tennessee was part of North Carolina, part of the Southwest Territory. Tennessee was admitted to the Union as the 16th state on June 1, 1796. Tennessee was the last state to leave the Union and join the Confederacy at the outbreak of the American Civil War in 1861.
Occupied by Union forces from 1862, it was the first state to be readmitted to the Union at the end of the war. Tennessee furnished more soldiers for the Confederate Army than any other state besides Virginia, more soldiers for the Union Army than the rest of the Confederacy combined. Beginning during Reconstruction, it had competitive party politics, but a Democratic takeover in the late 1880s resulted in passage of disenfranchisement laws that excluded most blacks and many poor whites from voting; this reduced competition in politics in the state until after passage of civil rights legislation in the mid-20th century. In the 20th century, Tennessee transitioned from an agrarian economy to a more diversified economy, aided by massive federal investment in the Tennessee Valley Authority and, in the early 1940s, the city of Oak Ridge; this city was established to house the Manhattan Project's uranium enrichment facilities, helping to build the world's first atomic bombs, two of which were dropped on Imperial Japan near the end of World War II.
Tennessee's major industries include agriculture and tourism. Poultry and cattle are the state's primary agricultural products, major manufacturing exports include chemicals, transportation equipment, electrical equipment; the Great Smoky Mountains National Park, the nation's most visited national park, is headquartered in the eastern part of the state, a section of the Appalachian Trail follows the Tennessee-North Carolina border. Other major tourist attractions include the Tennessee Aquarium in Chattanooga; the earliest variant of the name that became Tennessee was recorded by Captain Juan Pardo, the Spanish explorer, when he and his men passed through an American Indian village named "Tanasqui" in 1567 while traveling inland from South Carolina. In the early 18th century, British traders encountered a Cherokee town named Tanasi in present-day Monroe County, Tennessee; the town was located on a river of the same name, appears on maps as early as 1725. It is not known whether this was the same town as the one encountered by Juan Pardo, although recent research suggests that Pardo's "Tanasqui" was located at the confluence of the Pigeon River and the French Broad River, near modern Newport.
The meaning and origin of the word are uncertain. Some accounts suggest, it has been said to mean "meeting place", "winding river", or "river of the great bend". According to ethnographer James Mooney, the name "can not be analyzed" and its meaning is lost; the modern spelling, Tennessee, is attributed to James Glen, the governor of South Carolina, who used this spelling in his official correspondence during the 1750s. The spelling was popularized by the publication of Henry Timberlake's "Draught of the Cherokee Country" in 1765. In 1788, North Carolina created "Tennessee County", the third county to be established in what is now Middle Tennessee; when a constitutional convention met in 1796 to organize a new state out of the Southwest Territory, it adopted "Tennessee" as the name of the state. Tennessee is known as The Volunteer State, a nickname some claimed was earned during the War of 1812 because of the prominent role played by volunteer soldiers from Tennessee during the Battle of New Orleans.
Other sources differ on the origin of the state nickname. This explanation is more because President Polk's call for 2,600 nationwide volunteers at the beginning of the Mexican–American War resulted in 30,000 volunteers from Tennessee alone in response to the death of Davy Crockett and appeals by former Tennessee Governor and Texas politician, Sam Houston. Tennessee borders eight other states: Virginia to the north. Tennessee is tied with Missouri as the state bordering the most other states; the state is trisected by the Tennessee River. The highest point in the state is Clingmans Dome at 6,643 feet (
1910 United States Census
The Thirteenth United States Census, conducted by the Census Bureau on April 15, 1910, determined the resident population of the United States to be 92,228,496, an increase of 21.0 percent over the 76,212,168 persons enumerated during the 1900 Census. The 1910 Census switched from a portrait page orientation to a landscape orientation; the 1910 census collected the following information: Full documentation for the 1910 census, including census forms and enumerator instructions, is available from the Integrated Public Use Microdata Series. The column titles in the census form are as follows: LOCATION. Street, road, etc. House number. 1. Number of dwelling house in order of visitation. 2. Number of family in order of visitation. 3. NAME of each person whose place of abode on April 15, 1910, was in this family. Enter surname first the given name and middle initial, if any. Include every person living on April 15, 1910. Omit children born since April 15, 1910. RELATION. 4. Relationship of this person to the head of the family.
PERSONAL DESCRIPTION. 5. Sex. 6. Color or race. 7. Age at last birthday. 8. Whether single, widowed, or divorced. 9. Number of years of present marriage. 10. Mother of how many children: Number born. 11. Mother of how many children: Number now living. NATIVITY. Place of birth of each person and parents of each person enumerated. If born in the United States, give the state or territory. If of foreign birth, give the country. 12. Place of birth of this Person. 13. Place of birth of Father of this person. 14. Place of birth of Mother of this person. CITIZENSHIP. 15. Year of immigration to the United States. 16. Whether naturalized or alien. 17. Whether able to speak English. OCCUPATION. 18. Trade or profession of, or particular kind of work done by this person, as spinner, laborer, etc. 19. General nature of industry, business, or establishment in which this person works, as cotton mill, dry goods store, etc. 20. Whether as employer, employee, or work on own account. If an employee— 21. Whether out of work on April 15, 1910.
22. Number of weeks out of work during year 1909. EDUCATION. 23. Whether able to read. 24. Whether able to write. 25. Attended school any time since September 1, 1909. OWNERSHIP OF HOME. 26. Owned or rented. 27. Owned free or mortgaged. 28. Farm or house. 29. Number of farm schedule. 30. Whether a survivor of the Union or Confederate Army or Navy. 31. Whether blind. 32. Whether deaf and dumb. Special Notation In 1912 and 1959, New Mexico, Arizona and Hawaii would become the 47th, 48th, 49th and 50th states admitted to the Union; the 1910 population count for each of these areas was 327,301, 204,354, 64,356 and 191,909 respectively. On this basis, the ranking list above would be modified as follows: First 42 ranked states - positions unchanged New Mexico, Arizona, Hawaii, Wyoming and Alaska; the original census enumeration sheets were microfilmed by the Census Bureau in the 1940s. The microfilmed census is available in rolls from the National Records Administration. Several organizations host images of the microfilmed census online, along which digital indices.
Microdata from the 1910 census are available through the Integrated Public Use Microdata Series. Aggregate data for small areas, together with electronic boundary files, can be downloaded from the National Historical Geographic Information System. 1911 U. S Census Report Contains 1910 Census results Historic US Census data census.gov/population/www/censusdata/PopulationofStatesandCountiesoftheUnitedStates1790-1990.pdf
Hispanic and Latino Americans
Hispanic Americans and Latino Americans are Americans who are descendants of people from Spain and Latin America, respectively. More it includes all Americans who speak the Spanish language natively, who self-identify as Hispanic or Latino, whether of full or partial ancestry. For the 2010 United States Census, people counted as "Hispanic" or "Latino" were those who identified as one of the specific Hispanic or Latino categories listed on the census questionnaire as well as those who indicated that they were "other Spanish, Hispanic or Latino." The national origins classified as Hispanic or Latino by the United States Census Bureau are the following: Argentine, Colombian, Puerto Rican, Mexican, Costa Rican, Honduran, Panamanian, Bolivian, Spanish American, Ecuadorian, Peruvian and Venezuelan. Brazilian Americans, other Portuguese-speaking Latino groups, non-Spanish speaking Latino groups in the United States are defined as "Latino" by some U. S. government agencies. The Census Bureau uses the terms Hispanic and Latino interchangeably."Origin" can be viewed as the ancestry, nationality group, lineage or country of birth of the person or the person's parents or ancestors before their arrival in the United States.
People who identify as Spanish, Hispanic or Latino may be of any race. As one of the only two designated categories of ethnicity in the United States, Hispanics form a pan-ethnicity incorporating a diversity of inter-related cultural and linguistic heritages. Most Hispanic Americans are of Mexican, Puerto Rican, Salvadoran, Guatemalan or Colombian origin; the predominant origin of regional Hispanic populations varies in different locations across the country. Hispanic Americans are the second fastest-growing ethnic group by percentage growth in the United States after Asian Americans. Hispanic/Latinos overall are the second-largest ethnic group in the United States, after non-Hispanic whites. Hispanics have lived within what is now the United States continuously since the founding of St. Augustine by the Spanish in 1565. After Native Americans, Hispanics are the oldest ethnic group to inhabit much of what is today the United States. Many have Native American ancestry. Spain colonized large areas of what is today the American Southwest and West Coast, as well as Florida.
Its holdings included present-day California, New Mexico, Nevada and Texas, all of which were part of the Republic of Mexico from its independence in 1821 until the end of the Mexican–American War in 1848. Conversely, Hispanic immigrants to the New York-New Jersey metropolitan area derive from a broad spectrum of Latin American states. A study published in 2015 in the American Journal of Human Genetics, based on 23andMe data from 8,663 self-described Latinos, estimated that Latinos in the United States carried a mean of 65.1% European ancestry, 18.0% Native American ancestry, 6.2% African ancestry. The study found that self-described Latinos from the Southwest those along the Mexican border, had the highest mean levels of Native American ancestry; the terms "Hispanic" and "Latino" refer to an ethnicity. Hispanic people may share some commonalities in their language, culture and heritage. According to the Smithsonian Institution, the term "Latino" includes peoples with Portuguese roots, such as Brazilians, as well as those of Spanish-language origin.
In the United States, many Hispanics and Latinos are of both Native American ancestry. Others are predominantly of European ancestry or of Amerindian ancestry. Many Hispanics and Latinos from the Caribbean, as well as other regions of Latin America where African slavery was widespread, may be of sub-Saharan African descent as well; the difference between the terms Hispanic and Latino is confusing to some. The U. S. Census Bureau equates the two terms and defines them as referring to anyone from Spain and the Spanish-speaking countries of the Americas. After the Mexican–American War concluded in 1848, term Hispanic or Spanish American was used to describe the Hispanos of New Mexico within the American Southwest; the 1970 United States Census controversially broadened the definition to "a person of Mexican, Puerto Rican, South or Central American, or other Spanish culture or origin, regardless of race". This is now the common formal and colloquial definition of the term within the United States, outside of New Mexico.
The term Latino has developed a number of definitions. One definition of Latino is "a Latin male in the United States"; this is the oldest and the original definition used in the United States, first used in 1946. This definition encompasses Spanish speakers from both Europe and the Americas. Under this definition, immigrants from Spain and immigrants from Latin America are both Latino; this definition is consistent with the 21st-century usage by the U. S. Census Bureau and OMB, as the two agencies use Latino interchangeably. A definition of Latino is as a condensed form of the term "Latino-Americano", the Spanish word for Latin-American, or someone who comes from Latin America. Under this definition a Mexican American or Puerto Rican, for example, is both a Hispanic and a Latino. A Brazilian American is a Latino by this definition, which includes those of Portuguese-speaking origin from Latin America. However, an immigrant from Spain would be classified as European or White by American sta
Lee County, Virginia
Lee County is the westernmost county in the U. S. Commonwealth of Virginia; as of the 2015 census estimate, the population was 24,742. Its county seat is Jonesville; the first Europeans to enter what is present-day Lee County were a party of Spanish explorers, Juan de Villalobos and Francisco de Silvera, sent by Hernando de Soto in 1540, in search of gold. The county was formed in 1793 from Russell County, it was named for Light Horse Harry Lee, the Governor of Virginia from 1791 to 1794, famous for his exploits as a leader of light cavalry during the American Revolutionary War. He was the father of the Confederate General Robert E. Lee. Lee County was the final front on the Kentucky Trace, now known as the Wilderness Road and The Trail of the Lonesome Pine. During the 1780s and 1790s, fortified buildings called "stations" were built along the trail for shelter from Indian raids as the settlers followed Daniel Boone's footsteps into Kentucky; the stations in Lee County were Yoakum Station at present-day Dryden, west to Powell River and Station Creek at today's Rocky Station to Mump's Fort at Jonesville, followed by Prist Station, Chadwell Station at Chadwell Gap, Martin's Station at Rose Hill, Owen Station at Ewing, Gibson Station, which still bears its original name.
One of the largest early landowners was Revolutionary War officer and explorer Joseph Martin, after whom Martin's Station and Martin's Creek at Rose Hill are named. Due to his rank of command, Martin had been awarded some 25,000 acres, which he divided up and sold. Rose Hill, in 1832, was the first federally recognized post office in the county of Lee. In 1814, parts of Lee County, Russell County, Washington County were combined to form Scott County. In 1856, parts of Lee County, Russell County, Scott County were combined to form Wise County; the economy of Lee County has been based on growing tobacco and mining coal. The decline of both has resulted in high unemployment in the county and a decrease in population since 1940, the peak. Using the slogan Where Virginia Begins, the county has attempted to increase its heritage tourism industry by emphasizing its role in the route used by settlers going west through the Cumberland Gap, at Lee County's western tip. Lee County shares Cumberland Gap National Historical Park with Tennessee.
Attractions listed in the park include Hensley's Settlement, the Pinnacle Overlook, the Sand Cave, the White Rocks overlooking the towns of Ewing and Rose Hill in Virginia. According to the U. S. Census Bureau, the county has a total area of 437 square miles, of which 436 square miles is land and 1.9 square miles is water. Lee County is physically closer to eight state capitals other than its own capital in Richmond: Raleigh, North Carolina. Additionally, Cumberland Gap in the far western part of Lee County is closer to Montgomery, Alabama, a ninth state capital; the county is divided into seven districts: Jonesville, Rocky Station, Rocky Station Mineral, Rose Hill, White Shoals, Yoakum, St. Charles, Pennington Gap, Robbins Chapel and Yoakum Mineral. Harlan County, Kentucky - north Wise County, Virginia - northeast Scott County, Virginia - east Hancock County, Tennessee - south Claiborne County, Tennessee - south-southwest Bell County, Kentucky - west Cumberland Gap National Historical Park Jefferson National Forest US 23 US 58 US 58 Alt.
US 421 SR 70 SR 352 SR 600 As of the 2010 United States Census, there were 25,587 people residing in the county. 94.2% were White, 3.7% Black or African American, 0.4% Native American, 0.2% Asian, 0.6% of some other race and 0.9% of two or more races. 1.6% were Hispanic or Latino. According to the census 2009 estimates, there were 25001 people, 11,587 households, 6,852 families residing in the county; the population density was 54 people per square mile. There were 11,587 housing units at an average density of 25 per square mile; the racial makeup of the county was 96.3% White, 2.9% Black or African American, 0.2% Asian, 0.1% from other races, 0.7% of the population were Hispanic or Latino of any race. The largest ancestry groups in Lee County include: English, Irish and Scots-Irish. There were 9,706 households out of which 29.0 percent had children under the age of 18 living with them, 55.0 percent were married couples living together, 11.7 percent had a female householder with no husband present, 29.4 percent were non-families.
27.0 percent of all households were made up of individuals and 12.1 percent had someone living alone, 65 years of age or older. The average household size was 2.41 and the average family size was 2.91. In the county, the population was spread out with 22.8 percent under the age of 18, 8.0 percent from 18 to 24, 27.5 percent from 25 to 44, 26.3 percent from 45 to 64, 15.4 percent who were 65 years of age or older. The median age was 40 years. For every 100 females there were 94.2 males. For every 100 females age 18 and over, there were 91.3 males. The median income for a household in the county was $29,889, the median income for a family was $40,721; the per capita income for the county was $16,317. About 20.3 percent of families and 22.7 percent of the population were below the poverty line, including 30.1 percent of those under age 18 and 23.3 percent of those age 65 or over. The white majority of Lee County was solidly Democratic, like much of southwestern Virginia, until after 1964 and Congressional passage of civil rights legislation.
Since that time, it has favored Republican Party presidential candida
Median income is the amount that divides the income distribution into two equal groups, half having income above that amount, half having income below that amount. Mean income is the amount obtained by dividing the total aggregate income of a group by the number of units in that group. Mode income is the most occurring income in a given income distribution. Median income can be calculated by household income, by personal income, or for specific demographic groups. See the country lists in the household income article. In 2013, Gallup published a list of countries with median annual household income, based on a self-reported survey of 2000 adults from each country. Using median, rather than mean income, results in a much more accurate picture of the typical income of the middle class since the data will not be skewed by gains and abnormalities in the extreme ends; the figures are in international dollars using purchasing power parity and are based on responses from 2006 to 2012 inflation adjusted to 2010 levels.
Below is a list of the top 30 countries. The figures do not take social contributions into account. Please note that the list below does not correspond to citizens of each country, but to all its residents. States rich in fossil fuels such as Qatar and Kuwait have a large gap in terms of median annual earnings of citizens and non-citizens; the annual median equivalence disposable household income for selected OECD countries is shown in the table below. This is the disposable income of an equivalent adult in a household in the middle of the income distribution in a year. Data are in United States dollars at current prices and current purchasing power parity for private consumption for the reference year. An academic study on the Census income data claims that when correcting for underreporting, U. S. gross median household income was 15% higher in 2010. Since 1980, U. S. gross domestic product per capita has increased 67%, while median household income has only increased by 15%. Median household income is a politically sensitive indicator.
Voters can be critical of their government if they perceive that their cost of living is rising faster than their income. The early-2000s recession began with the bursting of the dot-com bubble and affected most advanced economies including the European Union and the United States. An economic recession will cause household incomes to decrease by as much as 10%; the late-2000s recession began with the bursting of the U. S. housing bubble, which caused a problem in the dangerously exposed sub prime-mortgage market. This in turn triggered a global financial crisis. In constant price, 2011 American median household income was 1.13% lower than what it was in 1989. This corresponds to a 0.05% annual decrease over a 22-year period. In the meantime, GDP per capita has increased by 33.8% or 1.33% annually. A study on US Census income data claims that when using the national accounting methodology, U. S. gross median household income was $57,739 in 2010. In 2015, the US median household income spiked 5.2 per cent, reaching $56,000, making it the first annual hike in median household income since the start of the Great Recession.
List of countries by average wage List of U. S. states by income Mean household income Income distribution Income quintiles Household income in the United States International Ranking of Household Income Median Median household income in Australia and New Zealand Median income per household member Places in the United States with notable demographic characteristics Poverty in the United States
Marriage called matrimony or wedlock, is a or ritually recognised union between spouses that establishes rights and obligations between those spouses, as well as between them and any resulting biological or adopted children and affinity. The definition of marriage varies around the world not only between cultures and between religions, but throughout the history of any given culture and religion, evolving to both expand and constrict in who and what is encompassed, but it is principally an institution in which interpersonal relationships sexual, are acknowledged or sanctioned. In some cultures, marriage is recommended or considered to be compulsory before pursuing any sexual activity; when defined broadly, marriage is considered a cultural universal. A marriage ceremony is known as a wedding. Individuals may marry for several reasons, including legal, libidinal, financial and religious purposes. Whom they marry may be influenced by gender determined rules of incest, prescriptive marriage rules, parental choice and individual desire.
In some areas of the world, arranged marriage, child marriage and sometimes forced marriage, may be practiced as a cultural tradition. Conversely, such practices may be outlawed and penalized in parts of the world out of concerns of the infringement of women's rights, or the infringement of children's rights, because of international law. Around the world in developed democracies, there has been a general trend towards ensuring equal rights within marriage for women and recognizing the marriages of interfaith and same-sex couples; these trends coincide with the broader human rights movement. Marriage can be recognized by a state, an organization, a religious authority, a tribal group, a local community, or peers, it is viewed as a contract. When a marriage is performed and carried out by a government institution in accordance with the marriage laws of the jurisdiction, without religious content, it is a civil marriage. Civil marriage recognizes and creates the rights and obligations intrinsic to matrimony before the state.
When a marriage is performed with religious content under the auspices of a religious institution it is a religious marriage. Religious marriage recognizes and creates the rights and obligations intrinsic to matrimony before that religion. Religious marriage is known variously as sacramental marriage in Catholicism, nikah in Islam, nissuin in Judaism, various other names in other faith traditions, each with their own constraints as to what constitutes, who can enter into, a valid religious marriage; some countries do not recognize locally performed religious marriage on its own, require a separate civil marriage for official purposes. Conversely, civil marriage does not exist in some countries governed by a religious legal system, such as Saudi Arabia, where marriages contracted abroad might not be recognized if they were contracted contrary to Saudi interpretations of Islamic religious law. In countries governed by a mixed secular-religious legal system, such as in Lebanon and Israel, locally performed civil marriage does not exist within the country, preventing interfaith and various other marriages contradicting religious laws from being entered into in the country, civil marriages performed abroad are recognized by the state if they conflict with religious laws.
The act of marriage creates normative or legal obligations between the individuals involved, any offspring they may produce or adopt. In terms of legal recognition, most sovereign states and other jurisdictions limit marriage to opposite-sex couples and a diminishing number of these permit polygyny, child marriages, forced marriages. In modern times, a growing number of countries developed democracies, have lifted bans on and have established legal recognition for the marriages of interfaith and same-sex couples; some cultures allow the dissolution of marriage through annulment. In some areas, child marriages and polygamy may occur in spite of national laws against the practice. Since the late twentieth century, major social changes in Western countries have led to changes in the demographics of marriage, with the age of first marriage increasing, fewer people marrying, more couples choosing to cohabit rather than marry. For example, the number of marriages in Europe decreased by 30% from 1975 to 2005.
In most cultures, married women had few rights of their own, being considered, along with the family's children, the property of the husband. In Europe, the United States, other places in the developed world, beginning in the late 19th century and lasting through the 21st century, marriage has undergone gradual legal changes, aimed at improving the rights of the wife; these changes included giving wives legal identities of their own, abolishing the right of husbands to physically discipline their wives, giving wives property rights, liberalizing divorce laws, providing wives with reproductive rights of their own, requiring a wife's consent when sexual relations occur. These changes have occurred in Western countries. In the 21st century, there continue to be controversies regarding the legal status of married women, legal acceptance of or leniency towards violence within marriage, traditional marriage customs such as dowry and bride price, for
Time in the United States
Time in the United States, by law, is divided into nine standard time zones covering the states and its possessions, with most of the United States observing daylight saving time for the spring and fall months. The time zone boundaries and DST observance are regulated by the Department of Transportation. Official and precise timekeeping services are provided by two federal agencies: the National Institute of Standards and Technology; the clocks run by these services are kept synchronized with each other as well as with those of other international timekeeping organizations. It is the combination of the time zone and daylight saving rules, along with the timekeeping services, which determines the legal civil time for any U. S. location at any moment. 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 locations were noticeable prior to the 19th century because of long travel times and the lack of long-distance instant communications prior to the development of the telegraph. The use of local solar time became awkward as railways and telecommunications improved. American railroads maintained many different time zones during the late 1800s; each train station set its own clock making it difficult to coordinate train schedules and confusing passengers. Time calculation became a serious problem for people traveling by train, according to the Library of Congress; every city in the United States used a different time standard so there were more than 300 local sun times to choose from. Time zones were therefore a compromise, relaxing the complex geographic dependence while still allowing local time to be approximate with mean solar time. Railroad managers tried to address the problem by establishing 100 railroad time zones, but this was only a partial solution to the problem.
Weather service chief Cleveland Abbe had needed to introduce four standard time zones for his weather stations, an idea which he offered to the railroads. Operators of the new railroad lines needed a new time plan that would offer a uniform train schedule for departures and arrivals. Four standard time zones for the continental United States were introduced at noon on November 18, 1883, when the telegraph lines transmitted time signals to all major cities. In October 1884, the International Meridian Conference at Washington DC adopted a proposal which stated that the prime meridian for longitude and timekeeping should be one that passes through the centre of the transit instrument at the Greenwich Observatory in the United Kingdom; the conference therefore established the Greenwich Meridian as the prime meridian and Greenwich Mean Time as the world's time standard. The US time-zone system grew from this, in which all zones referred back to GMT on the prime meridian. In 1960, the International Radio Consultative Committee formalized the concept of Coordinated Universal Time, which became the new international civil time standard.
UTC is, within about 1 second, mean solar time at 0°. UTC does not observe daylight saving time. For most purposes, UTC is considered interchangeable with GMT, but GMT is no longer defined by the scientific community. UTC is one of several related successors to GMT. Standard time zones in the United States are defined at the federal level by law 15 USC §260; the federal law establishes the transition dates and times at which daylight saving time occurs, if observed. It is 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; as of August 9, 2007, the standard time zones are defined in terms of hourly offsets from UTC. Prior to this they were based upon the mean solar time at several meridians 15° apart west of Greenwich. Only the full-time zone names listed below are official. View the standard time zone boundaries here; the United States uses nine standard time zones.
As defined by US law they are: From east to west, the four time zones of the contiguous United States are: Eastern Time Zone, which comprises the states on the Atlantic coast and the eastern two thirds of the Ohio Valley. Central Time Zone, which comprises the Gulf Coast, Mississippi Valley, most of the Great Plains. Mountain Time Zone, which comprises the states and portions of states that include the Rocky Mountains and the western quarter of the Great Plains. Pacific Time Zone, which comprises the states on the Pacific coast, plus Nevada and the Idaho panhandle. Alaska Time Zone, which comprises most of the state of Alaska. Hawaii-Aleutian Time Zone, which includes Hawaii and most of the length of the Aleutian Islands chain. Samoa Time Zone, which comprises American Samoa. Chamorro Time Zone, which comprises Guam and the Northern Mariana Islands. Atlantic Time Zone, which comprises Puerto Rico and the US Virgin Islands; some United States Minor Outlying Islands are outside the time zones defined by 15 U.
S. C. § exist in waters defined by Nautical time. In practice, military crews may