Contents 1 Human time periods 1.1 Prehistorical periods 1.2 Historical periods 1.3 Calendar systems 1.4 Mythological and astrological time periods 2 Cosmological time periods 2.1 13.7 billion years ago: The Big Bang 2.2 Formation of Population III stars 2.3 Formation of Population II stars 2.4 5 Billion Years ago - Formation of Population I stars 3 Geologic time periods 4 See also 5 References

The categorization of time into discrete named blocks is called periodization. For other uses see Time (disambiguation Time is a component of a measuring system used to sequence events to compare the durations of Periodization is the attempt to categorize or divide Time into discrete named blocks This is a list of such named time periods as defined in various fields of study. Major categorization systems include cosmological (concerning the various time periods in the origin and evolution of our universe), geological (concerning time periods in the origin and evolution of earth ) and historical (concerning time periods in the origin, evolution of mankind). Cosmology (from Greek grc κοσμολογία - grc κόσμος kosmos, "universe" and grc -λογία -logia) is study The Big Bang is the cosmological model of the Universe that is best supported by all lines of scientific evidence and Observation. The Universe is defined as everything that Physically Exists: the entirety of Space and Time, all forms of Matter, Energy Geology (from Greek γη gê, "earth" and λόγος Logos, "speech" lit The history of Earth covers approximately 46 billion years (4567000000 years from Earth ’s formation out of the Solar nebula to the present EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 History is the study of the past particularly the written record Those who study history as a Profession are called Historians Etymology Human evolution, or anthropogenesis, is the part of biological Evolution concerning the emergence of Homo sapiens as a distinct Species

Human time periods

Based on current and debatable evidence, the human species has found its origins starting from about 250,000 years ago - when homo began to develop. Homo is the Genus that includes modern humans and their close relatives It is broadly divided into prehistorical (before history began to be recorded) and historical periods (when written records began to be kept).

Further information: Human evolution

Prehistorical periods

Main article: List of archaeological periods

In archaeology and anthropology, human prehistory is subdivided around the three-age system. Human evolution, or anthropogenesis, is the part of biological Evolution concerning the emergence of Homo sapiens as a distinct Species Names for archaeological periods vary enormously from region to region Archaeology, archeology, or archæology (from Greek grc ἀρχαιολογία archaiologia – grc ἀρχαῖος archaīos Anthropology (/ˌænθɹəˈpɒlədʒi/ from Greek grc ἄνθρωπος anthrōpos, "human" -λογία -logia) is the study of Stone Age Paleolithic See also Paleolithic, Recent African Origin, Early Homo sapiens, Early human migrations "Paleolithic" The three-age system refers to the Periodization of Human Prehistory into three consecutive Time periods named for their respective

• The Stone Age
  • In some regions the Stone Age is divided into the Paleolithic Age (Old Stone Age) and the Neolithic Age (New Stone Age). The Stone Age is a broad prehistoric time period during which Humans widely used stone for toolmaking The term Paleolithic (or Palaeolithic) (from Greek παλαιός palaios, " Old " and λίθος Lithos, "stone" The Neolithic (from Greek νεολιθικός — neolithikos from νέος neos, "new" + λίθος lithos
  • In other regions the Stone Age is divided into the Paleolithic Age, the Mesolithic Age (Middle Stone Age, also called the Epipaleolithic Age), and the Neolithic Age. The Mesolithic or Middle Stone Age was a period in the development of human technology in between the Paleolithic or Old Stone Age and the Neolithic or New Stone Age The Epipaleolithic is a term used for the "final Upper Palaeolithic industries occurring at the end of the final glaciation which appear to merge technologically into the
• The Copper Age (aka Chalcolithic Age). The Chalcolithic (Greek khalkos + lithos ' Copper stone' period or Copper Age period known as the '''Eneolithic''' ('''Æneolithic''' is a The Copper Age was not part of the original three-age system.
• The Bronze Age
• The Iron Age

The dates for each age can vary by region. The term Bronze Age refers to a period in human cultural development when the most advanced Metalworking (at least in systematic and widespread use included techniques for This article is about the archaeological period known as the Iron Age for the mythological Iron Age see Ages of Man. On the geologic time scale, the Holocene epoch starts at the end of the most recent Ice age (about 9400 BC) and continues to the present. The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other The Holocene is a Geological epoch which began approximately 10000 years ago (about 8000 BC An ice age is a period of long-term reduction in the Temperature of the Earth 's surface and atmosphere resulting in an expansion of continental Ice sheets The beginning of Mesolithic is usually considered to correspond to the beginning of the Holocene epoch. The Holocene is a Geological epoch which began approximately 10000 years ago (about 8000 BC

Historical periods

Further information: History of the world

• Ancient history, Classical antiquity
  • Mesopotamia (6000 BC - 1100 BC)
  • Indus Valley Civilization (3300 BC - 1300 BC)
  • Old Kingdom (Egypt, 3000 BC - 2000 BC)
  • Middle Kingdom (Egypt, 2000 BC - 1300 BC)
  • Shang Dynasty (China 1800 BC - 1200 BC)
  • Vedic Period (India 1500 BC - 500 BC)
  • New Kingdom (Egypt, 1300 BC - 700 BC)
  • Zhou Dynasty (China 1200 BC - 500 BC)
  • Ancient Greece (Greece and Near East, c. Prehistory See also Prehistory Paleolithic See also Paleolithic, Recent African Origin, Early Homo sapiens "Ancient" redirects here For other uses see Ancient_(disambiguation. Classical antiquity (also the classical era or classical period) is a broad term for a long period of cultural History centered on the Mediterranean Ancient Mesopotamia was settled and conquered by numerous ancient Civilizations. During the 6th millennium BC, Agriculture spreads from the Balkans to Italy and Eastern Europe and from Mesopotamia to Egypt. The Indus Valley Civilization (Mature period 2600&ndash1900 BCE abbreviated IVC, was an ancient Civilization that flourished in the Indus River basin Events The Great God "Krishna" who is worshiped in all forms as a boy lover warrior brother king teacher son husband etc The Old Kingdom is the name commonly given to that period in the 3rd millennium BCE when Egypt attained its first continuous peak of civilization in complexity and achievement This article is about the country of Egypt For a topic outline on this subject see List of basic Egypt topics. The 30th century BC is a Century which lasted from the year 3000 BC to 2901 BC The 20th century BC is a Century which lasted from the year 2000 BC to 1901 BC This article is about the country of Egypt For a topic outline on this subject see List of basic Egypt topics. The 20th century BC is a Century which lasted from the year 2000 BC to 1901 BC The Shang Dynasty ( Chinese: 商[[wiktionary 朝|朝]] or Yin Dynasty ( 殷[[wiktionary 代|代]] was according to traditional sources the China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National The 18th century BC was the Century which lasted from 1800 BC to 1701 BC The Vedic Period (or Vedic Age) is the period in the History of India during which the Vedas, the oldest sacred texts of Hinduism, were being India, officially the Republic of India (भारत गणराज्य inc-Latn Bhārat Gaṇarājya; see also other Indian languages) is a country The New Kingdom, sometimes referred to as the Egyptian Empire, is the period in Ancient Egyptian history between the 16th century BC and This article is about the country of Egypt For a topic outline on this subject see List of basic Egypt topics. The Zhou Dynasty ( POJ: Chiu Tiau 1122 BC to 256 BC was preceded by the Shang Dynasty and followed by the Qin Dynasty in China. China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National The term ancient Greece refers to the period of Greek history lasting from the Greek Dark Ages ca Greece (Ελλάδα transliterated: Elláda, historically, Ellás,) officially the Hellenic Republic (Ελληνική Δημοκρατία B Syria - Belka Woman from Damascus Arab from Baghdadjpg|thumb|Inhabitants of the Near East late nineteenth century 1000 BC- 31 BC, see Timeline of Ancient Greece)
  • Jomon period (Japan 800 BC-400 BC)
  • Ancient Rome 509 BC - 476)
  • Yayoi Period (Japan 400 BC - 300)
  • Kofun Period (Japan 300- 600)
  • Migration Period (Europe 200 - 700)
• Middle Ages (Europe, 4th century - 15th century)
  • Dark Age (Europe, 4th century - 900)
  • Viking Age (Scandinavia, Europe, 793 - 1066)
  • Asuka period, Nara period, Heian period, Kamakura period, Muromachi period, and Azuchi-Momoyama period (Japan, 538 - 1603)
  • Southern and Northern Dynasties, Sui Dynasty, Tang Dynasty, Period of Five Dynasties and Ten Kingdoms (China, 420 - 960), Liao Dynasty, Song Dynasty, Jin Dynasty (1115–1234), Western Xia Dynasty, Yuan Dynasty, and Ming Dynasty (China, 220 - 1644)
  • Classic and Postclassic eras, Central America (200 - 1519)
  • Gupta Empire, Pala Empire, Rashtrakuta, Hoysala Empire, and Kakatiya Empire (India, 280 – 1323)
  • Islamic Golden Age (Islam, 700 - 1300)
  • Srivijaya (Indonesia, 3rd century to 14th century), Tarumanagara (358-723), Sailendra (8th & 9th centuries), Kingdom of Sunda (669-1579), Kingdom of Mataram (752–1045), Kediri (1045–1221), Singhasari (1222–1292), Majapahit (1293–1500)
  • Chenla (Cambodia, 630 – 802) and Khmer Empire (Cambodia, 802 – 1432)
  • Anterior Lý Dynasty and Triệu Việt Vương, Third Chinese domination, Khúc Family, Dương Đình Nghệ, Kiều Công Tiễn, Ngô Dynasty, The 12 Lords Rebellion, Đinh Dynasty, Prior Lê Dynasty, Lý Dynasty, Trần Dynasty, Hồ Dynasty, Fourth Chinese domination (Vietnam, 544 - 1427)
  • Early Intermediate, Middle Horizon, Late Intermediate, Late Horizon (Peru, 200 - 1534)
    • Huari, Chimú, Chincha, Chanka Confederation, Tiwanaku, Inca
• Early modern period (Europe, 14th century - 18th century)
  • The Renaissance (Europe, 14th century - 16th century)
  • Age of Discovery (or Exploration) (Europe, 15th century - 17th century)
  • Elizabethan period (United Kingdom, 1558 - 1603)
  • The Protestant Reformation (Europe, 16th century)
  • Jacobean Era (United Kingdom, 1603-1625)
  • The Age of Enlightenment (or Reason) (Europe,18th century)
  • Tokugawa shogunate (Japan, 1603 - 1868)
  • Mughal Empire (India, 1526 - 1857)
  • Ottoman Empire (Islam, 1299 – 1923)
  • Qing dynasty (China, 1644 - 1912)
  • Spanish hegemony (Americas, 16th century - 1820s; Europe, 16th and 17th century, Philippines, 1525 - 1898)
• Modern era (Europe, 18th century - 20th century)
  • Industrial Revolution (Europe, United States, elsewhere 18th and 19th centuries)
  • (along with early modern era) Age of European colonialism and imperialism
  • Napoleonic Era (1799 - 1815)
  • Georgian Era (United Kingdom, 1714 - 1830)
  • Victorian era (United Kingdom, 1837 - 1901); British hegemony, much of world, around the same time period. Year 31 BC was a Common year starting on Tuesday (link will display the full calendar of the Julian calendar. This is a timeline of Ancient Greece. All dates are BCE. Aegean civilization ( Bronze Age) Mainland Greece The is the time in Japanese prehistory from about 14000 BC to 400 BC. For a topic outline on this subject see List of basic Japan topics. Events By place Persian Empire Artaxerxes II King of Persia appoints Tissaphernes to take over all the districts in This is a Timeline of events concerning ancient Rome, from the city foundation until the last attempt of the Eastern Roman Empire to re-conquer Rome Events By place Western Roman Empire September 4 — Romulus Augustus, the last Emperor of the Western Roman Empire The is an era in the history of Japan from about 500 BC to 300 AD. For a topic outline on this subject see List of basic Japan topics. Events By place Persian Empire Artaxerxes II King of Persia appoints Tissaphernes to take over all the districts in Events By place Roman Empire The Franks penetrate into what is now northern Belgium (approximate date The is an era in the History of Japan from around 250 to 538 The word kofun is Japanese for the type of burial mounds dating from this era For a topic outline on this subject see List of basic Japan topics. Events By place Roman Empire The Franks penetrate into what is now northern Belgium (approximate date Events By Place World The population of the Earth rises to about 208 million people The Migration Period, also called Barbarian Invasions, or sometimes Völkerwanderung ( German for "wandering of peoples" is the English name Events By Place World Human population reaches about 257 million Events By Place North America The Mount Edziza volcanic complex erupts in northern British Columbia, Canada. As a means of recording the passage of Time, the 4th century (per the Julian calendar and Anno Domini / Common era) was that Century This article is about the phrase "Dark Age(s" as a characterization of the Early Middle Ages in Western Europe As a means of recording the passage of Time, the 4th century (per the Julian calendar and Anno Domini / Common era) was that Century Events By place Asia Laguna Copperplate Inscription, Kavi script inscribed in Luzon, Philippines, Viking Age is the term denoting the years from about 700 to 1066 in European history. Terminology and usage As a cultural term "Scandinavia" has no official definition and is subject to usage by those who identify with the culture in question as well Events By Place Europe June 8 - Viking age: Vikings sack the Monastery of Lindisfarne, Northumbria The, was a period in the History of Japan lasting from 538 to 710 (or 592-645 although its beginning could be said to overlap with the preceding Kofun period. The of the History of Japan covers the years from AD 710 to 794. The is the last division of classical Japanese history, running from 794 to 1185. The is a period of Japanese history that marks the governance by the Kamakura Shogunate, officially established in 1192 by the first Kamakura Shogun The Muromachi period ( Japanese: 室町時代 Muromachi-jidai, also known as the Muromachi era, the Muromachi bakufu, the Ashikaga era The came at the end of the Warring States Period in Japan, when the political unification that preceded the establishment of the Tokugawa shogunate took place For a topic outline on this subject see List of basic Japan topics. Events By Place Europe March 12 — Witiges, king of the Ostrogoths, ends his siege of Rome and retreats to This article is about the Southern and Northern Dynasties in China. The Sui Dynasty ( 581 - 618 AD and in the undertaking of other construction projects including the reconstruction of the Great Wall. The Tang Dynasty ( Middle Chinese: dhɑng (June 18 618&ndashJune 4 907 was an imperial dynasty of China preceded by the Sui Dynasty and followed by Five Dynasties and Ten Kingdoms ( 907-960 was an era of political upheaval in China, beginning in the Tang Dynasty and ending in the Song Dynasty. China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National Events By Place Europe Pharamond leads the Franks across the Rhine. Events By Place Europe Edgar the Peaceable is crowned King of England. The Liao Dynasty ( 907 - 1125, also known as the Khitan Empire (契丹國 was an empire in northern China that ruled over the regions of Manchuria The Song Dynasty ( Wade-Giles: Sung Ch'ao was a ruling dynasty in China between 960&ndash1279 CE it succeeded the Five Dynasties and Ten Kingdoms This is an article for the Jurchen Jin Dynasty (1115–1234 For other Chinese dynasties whose names are also rendered "Jin" in Pinyin, see Jin Dynasty Xi Xia redirects here For a Chinese general whose name may be transliterated as Xi Xia see Xi Qia The Western Xia Dynasty ( or The Yuan Dynasty ( Pinyin: Yuáncháo Dai Ön Ulus (Дай Юан Улс was a ruling Dynasty founded by the Mongol leader Kublai The Ming Dynasty ( or Empire of the Great Ming ( was the ruling dynasty of China from 1368 to 1644 following the collapse of the Mongol -led China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National Events By Place Roman Empire The Goths invade Asia Minor and the Balkans. Mesoamerican chronology divides the history of Pre-Columbian Mesoamerica into a number of named successive eras or periods from the earliest evidence of human habitation Events By Place World Human population reaches about 257 million The Gupta Empire ( Hindi: गुप्त राजवंश was ruled by members of the Gupta dynasty from around 320 to 550 C The Pala Empire was a dynasty in control of the northern and eastern Indian subcontinent, mainly the Bengal and Bihar regions from the 8th to The Rashtrakuta Dynasty ( Sanskrit: राष्ट्रकूट rāṣṭrakūṭa, Kannada: ರಾಷ್ಟ್ರಕೂಟ was a royal The Hoysala Empire ( Kannada: ಹೊಯ್ಸಳ ಸಾಮ್ರಾಜ್ಯ ( pronunciation: in Kannada was a prominent South Indian Kannadiga The Kakatiya dynasty was a South Indian Dynasty that ruled parts of what is now Andhra Pradesh, India from 1083CE to 1323CE India, officially the Republic of India (भारत गणराज्य inc-Latn Bhārat Gaṇarājya; see also other Indian languages) is a country Events By Place Roman Empire Emperor Probus suppresses the revolt of the usurper Proculus. For other meanings including people named 'Islam' see Islam (disambiguation. Events By Place North America The Mount Edziza volcanic complex erupts in northern British Columbia, Canada. Srivijaya or Sriwijaya was an ancient Malay kingdom on the island of Sumatra, Southeast Asia which influenced much of the Malay Archipelago. The Republic of Indonesia ( (Republik Indonesia is a Country in Southeast Asia. The 3rd century is the period from 201 to 300 in accordance with the Julian calendar in the Christian / Common Era. Tarumanagara or Taruma Kingdom or just Taruma is an early Sundanese kingdom whose fifth-century ruler Sailendra (Sanskrit Lord of the Mountain) is the name of an influential Indonesian dynasty that emerged in 8th century Java. The Sunda Kingdom was according to primary historical records from the sixteenth century a kingdom covering areas of present-day Banten Province Jakarta, West Mataram was an Indianized kingdom based in Central Java between the 8th and 10th centuries AD and was established by king Sanjaya, he was also known as Kediri was an Indianized kingdom based in East Java from 1042 to around 1222. Singhasari was a kingdom located in east Java between 1222 and 1292 Majapahit was an Indianized kingdom based in eastern Java from 1293 to around 1500. Chenla ( Khmer: ចេនឡា known as Zhenla ( 真[[wikt 腊|腊]] in Chinese and Chân Lạp in Vietnamese, was an The Kingdom of Cambodia ( formerly known as Kampuchea (, transliterated: Preăh Réachéanachâkr Kâmpŭchea) is a country in South East Events By Place Byzantine Empire Serbs settle in the Balkans having been invited by the Byzantine emperor Heraclius This article is about the year 802 For other uses see IEEE 802 networking standard The Khmer Empire was the largest empire of South East Asia based in what is now Cambodia. The Kingdom of Cambodia ( formerly known as Kampuchea (, transliterated: Preăh Réachéanachâkr Kâmpŭchea) is a country in South East This article is about the year 802 For other uses see IEEE 802 networking standard Lý Nam Đế ( 李[[wikt 南|南]] 帝, Lý The Southern Emperor) was originally Lý Bí or Lý Bôn ( 李[[wikt 賁|賁]] Triệu Việt Vương ( Hán tự: 趙[[wikt 越|越]] 王; ? The Third Chinese domination of Vietnam saw two Chinese imperial dynasties rule over the Chinese controlled region of Chiaozhou ( 交州, Vietnamese Giao Châu an The Khúc family (Họ Khúc was a session of leaders who challenged Tang rule over Vietnam. Dương Đình Nghệ ( Hán tự: 楊廷藝 ?-937 some sources record Dương Diên Nghệ, 楊延藝 was the administrator of Giao Chỉ in around 931 The Ngô Dynasty ( Vietnamese: Nhà Ngô Hán tự: 吳[[wikt 朝|朝]] 939-967 was a dynasty in Vietnam. The 12 Lords Rebellion (Loạn 12 Sứ Quân was a period of chaos and civil war in the History of Vietnam, from 966 to 968 AD during the Ngô Dynasty, due to a conflict The Đinh Dynasty ( Vietnamese: Nhà Đinh; Han-Viet: Đinh Triều, 丁[[wikt 朝|朝]] was the imperial dynasty of Vietnam The Anterior Lê Dynasty or Prior Lê Dynasty ( Vietnamese: Nhà Tiền Lê; IPA: /ɲa˨˩ tiən˨˩ le/ was a dynasty that ruled Vietnam The Lý Dynasty ( Vietnamese: nhà Lý, IPA: /ɲa˨˩ li˦˥/ pronounced like Lee) sometimes known as the Posterior Lý Dynasty ( The Trần Dynasty ( Vietnamese: Nhà Trần, Hán Việt: Trần Triều, 陳朝 was a Vietnamese dynasty that ruled Vietnam (at that The Hồ Dynasty ( Vietnamese: Nhà Hồ; Hán Việt: Hồ Triều) in Vietnam was a short-lived seven-year reign of two emperors The fourth Chinese domination was a period of the History of Vietnam, from 1407 to 1427, upon which the country was ruled by the Ming Dynasty Vietnam (ˌviːɛtˈnɑːm Việt Nam) officially Events By Place Byzantine Empire Belisarius is sent back to Italy to once more fight the Ostrogoths who have This Peru (Perú Piruw Piruw officially the Republic of Peru ( reˈpuβlika del peˈɾu is a country in western South America. Events By Place World Human population reaches about 257 million This article is about the historical civilization and city located near present-day Ayacucho The Chimú were the residents of Chimor with its capital at the city of Chan Chan, a large adobe city in the Moche valley of Trujillo, Peru Chincha may refer to the following;Locations Chincha Alta, a Peruvian city Tiwanaku (Spanish spellings Tiahuanaco and Tiahuanacu) is an important Pre-Columbian archaeological site in western Bolivia. The early modern period is a term initially used by historians to refer mainly to the period roughly from 1500 to 1800 in Western Europe ( Early modern Europe) The 18th century lasted from 1701 to 1800 in the Gregorian calendar, in accordance with the Anno Domini / Common Era numbering system The Renaissance (from French Renaissance, meaning "rebirth" Italian: Rinascimento, from re- "again" and nascere The Age of Discovery or Age of Exploration was a period from the early 15th century and continuing into the early 17th century during which Europeans explored As a means of recording the passage of Time, the 17th Century was that Century which lasted from 1601 - 1700 in the Gregorian calendar Romance and reality The Victorian era and the early twentieth century idealised the Elizabethan era The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located The Protestant Reformation was a reform movement in Europe that began in 1517 though its roots lie further back in time Highlights of the Jacobean Era The practical if not formal unification of England and Scotland under one ruler was a development of the first order of importance for both The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located The Age of Enlightenment or The Enlightenment is a term used to describe a phase in Western philosophy and cultural life centered upon the eighteenth century The 18th century lasted from 1701 to 1800 in the Gregorian calendar, in accordance with the Anno Domini / Common Era numbering system The Tokugawa shogunate, also known as the, and the, was a feudal regime of Japan established by Tokugawa Ieyasu and ruled by the Shoguns of The Mughal Empire ( Persian and self-designation گورکانی; مغلیہ سلطنت) was an Islamic imperial power which ruled most The Ottoman Empire (1299–1923 ( Old Ottoman Turkish: دولتْ علیّه عثمانیّه Devlet-i Âliye-yi Osmâniyye, Late Ottoman and Modern Turkish Not to be confused with Qin Dynasty, the first dynasty of Imperial China The Spanish Empire (Imperio Español was one of the largest Empires in history and one of the first Global empires In the 15th and 16th centuries The Philippines ( Filipino: Pilipinas, officially known as the Republic of the Philippines (fil ''Republika ng Pilipinas'' RP Year 1898 ( MDCCCXCVIII) was a Common year starting on Saturday (link will display the full calendar of the Gregorian calendar (or a Common The term modern period or modern era (sometimes also modern times) is the period of history that followed the Middle Ages between c The 18th century lasted from 1701 to 1800 in the Gregorian calendar, in accordance with the Anno Domini / Common Era numbering system The twentieth century of the Common Era began on The Industrial Revolution was a period in the late 18th and early 19th centuries when major changes in agriculture manufacturing and transportation had a profound effect on the The United States of America —commonly referred to as the The 18th century lasted from 1701 to 1800 in the Gregorian calendar, in accordance with the Anno Domini / Common Era numbering system The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar See Colony and Colonization for examples of colonialism which do not refer to Western colonialism Imperialism has two meanings one describing an action and the other describing an attitude Timeline of the Napoleonic eraThe Napoleonic Era is a period in the History of France and Europe Year 1799 ( MDCCXCIX) was a Common year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Year 1815 ( MDCCCXV) was a Common year starting on Sunday (link will display the full calendar of the Gregorian calendar (or a Common year The arts Especially during the mid-18th century the period was marked by cultural vibrancy with the establishment of the British Museum in 1753 and the contributions The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located Year 1714 ( MDCCXIV) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar (or a For the game see 1830 (board game. Year 1830 ( MDCCCXXX) was a Common year starting on Friday (link will display Culture The Victorian fascination with novelty resulted in a deep interest in the relationship between modernity and cultural continuities The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located Year 1837 ( MDCCCXXXVII) was a Common year starting on Sunday (link will display the full calendar of the Gregorian Calendar (or a Common Year 1901 ( MCMI) was a Common year starting on Tuesday (link will display calendar of the Gregorian calendar (or a Common year starting The British Empire was the largest empire in history and for over a century was the foremost global power.
  • Edwardian period (United Kingdom, 1901 - 1910)
  • Meiji era (Japan, 1868 - 1912)
  • Machine Age(1900 - 1945)
  • World War I (Much of Earth, 1914 - 1918)
  • Interwar period (Earth, 1918 - 1939 or 1937)
  • World War II (Earth, 1937 or 1939 - 1945)
• Post-Modern (USA, 1949 - Present)
  • Atomic Age (after 1945)
  • Cold War (Soviet Union and United States, as well their allied states, 1945 - 1989 or 1991)
  • Space Age (after 1957)
  • Information Age (1971 - Present)

Calendar systems

Various societies in the past have created calendars to record events, such as religious observances and agricultural tasks. Class and society Socially the Edwardian era was a period during which the British Class system was very rigid The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located Year 1901 ( MCMI) was a Common year starting on Tuesday (link will display calendar of the Gregorian calendar (or a Common year starting Year 1910 ( MCMX) was a Common year starting on Saturday (link will display calendar of the Gregorian calendar (or a Common year starting The, or Meiji era, denotes the 45-year reign of the Meiji Emperor, running in the Gregorian calendar, from 23 October 1868 to 30 July For a topic outline on this subject see List of basic Japan topics. Year 1868 ( MDCCCLXVIII) was a Leap year starting on Wednesday (link will display the full calendar of the Gregorian Calendar (or a Leap Year 1912 ( MCMXII) was a Leap year starting on Monday (link will display the full calendar of the Gregorian calendar (or a Leap year starting Machine Age is a term associated with the early 20th Century. Year 1900 ( MCM) was an exceptional Common year starting on Monday (link will display the full calendar of the Gregorian calendar Year 1945 ( MCMXLV) was a Common year starting on Monday (link will display the full calendar World War I (abbreviated WWI; also known as the First World War, the Great War, and the War to End All Year 1914 ( MCMXIV) was a Common year starting on Thursday (link will display the full calendar of the Gregorian calendar (or a Common year Year 1918 ( MCMXVIII) was a Common year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Common Year 1939 ( MCMXXXIX) was a Common year starting on Sunday (link will display the full calendar of the Gregorian calendar. World War II, or the Second World War, (often abbreviated WWII) was a global military conflict which involved a majority of the world's nations, including Year 1945 ( MCMXLV) was a Common year starting on Monday (link will display the full calendar Postmodernism literally means 'after the modernist movement' While " Modern " itself refers to something "related to the present" the movement of modernism The United States of America —commonly referred to as the Year 1949 ( MCMXLIX) was a Common year starting on Saturday (link will display the full calendar of the Gregorian calendar. The present is the Time that is perceived directly not as a recollection or a speculation The Atomic Age, also known as the Atomic Era, is a phrase typically used to delineate the period of history following the detonation of the first nuclear bomb Year 1945 ( MCMXLV) was a Common year starting on Monday (link will display the full calendar Cold War is the state of conflict tension and competition that existed between the United States and the Soviet Union (USSR and their respective allies from the The Union of Soviet Socialist Republics (USSR was a constitutionally Socialist state that existed in Eurasia from 1922 to 1991 The United States of America —commonly referred to as the Year 1989 ( MCMLXXXIX) was a Common year starting on Sunday (link displays 1989 Gregorian calendar) Year 1991 ( MCMXCI) was a Common year starting on Tuesday (link will display full calendar of the Gregorian Calendar. The Space Age is a contemporary period encompassing the activities related to the Space Race, Space exploration, space technology and the cultural developments Year 1957 ( MCMLVII) was a Common year starting on Tuesday (link displays the 1957 Gregorian calendar) Information Age is a term that has been used to refer to the present era Year 1971 ( MCMLXXI) was a Common year starting on Friday (link will display full calendar of the 1971 Gregorian calendar. The present is the Time that is perceived directly not as a recollection or a speculation The word Calendar consist of two words 1 Cal ( in Pashto means Year in Hindi and Persian is Sal- also means Year A common characteristic of most known calendars is that they measure time in relation to a particular point in history, known as the epoch date. In the fields of Chronology and Periodization, an epoch means an instant in time chosen as the origin of a particular Era. A period between epoch dates is known as a calendar era. A calendar era is the year numbering system used by a Calendar. 27!É

Mythological and astrological time periods

• Astrological ages
  • Age of Taurus
  • Age of Aries
  • Age of Pisces
  • Age of Aquarius

• Greek mythology
  • Golden Age, self-sufficient
  • Silver Age, self-indulgent
  • Bronze Age, warlike
  • Heroic Age, nobly aspirant
  • Iron Age, violent

• Aztec mythology
  • Nahui-Ocelotl, Destroyed by Jaguars
  • Nahui-Ehécatl, Destroyed by Hurricane
  • Nahuiquiahuitl, Destroyed by rain of Fire
  • Nahui-Atl, Destroyed by Flood
  • Nahui-Ollin, Destroyed by Earthquakes

Cosmological time periods

13. For the song see Aquarius/Let the Sunshine In. For the album see The Age of Aquarius (album. For the song see Aquarius/Let the Sunshine In. For the album see The Age of Aquarius (album. For the song see Aquarius/Let the Sunshine In. For the album see The Age of Aquarius (album. For the song see Aquarius/Let the Sunshine In. For the album see The Age of Aquarius (album. For the song see Aquarius/Let the Sunshine In. For the album see The Age of Aquarius (album. Greek mythology is the body of stories belonging to the ancient Greeks concerning their gods and Heroes the nature of the world and the origins and significance The term Golden age is best known from Greek mythology and legend but can also be found in other ancient cultures (see below A silver age is a name often given to a particular period within a history typically as a lesser and later successor to a golden age, the metal Silver generally being The Heroic Age was the period of Greek mythological history that lay between the purely divine events of the Theogony and Titanomachy and the advent of historical The Aztec civilization recognized a polytheistic mythology which contained the many gods (over 100 and supernatural creatures from their religious beliefs 7 billion years ago: The Big Bang

Main article: Timeline of the Big Bang

Because of the scales involved (both very large and very small), cosmological time periods are usually described in seconds. This timeline of the Big Bang describes the events according to the Scientific theory of the Big Bang, using the cosmological time parameter of Comoving coordinates The second ( SI symbol s) sometimes abbreviated sec, is the name of a unit of Time, and is the International System of Units In this table, each row is defined in seconds after the Big Bang, with earliest at the top of the chart. The Big Bang is the cosmological model of the Universe that is best supported by all lines of scientific evidence and Observation.

Seconds after the Big Bang	Period
5. 4 × 10−44	Planck time
10−43 to 10−35	Planck Epoch
10−35 to 10−33	Inflationary epoch
10−35 to 10−12	Epoch of Grand Unification
10−12 to 10−6	Electroweak Epoch
10−6 to 100	Hadron Epoch
1 to 100	Lepton Epoch

100 seconds to 300,000 years after the big bang - Epoch of Nucleosynthesis

300,000 years on from the Big Bang - Epoch of Galaxies

Formation of Population III stars

The first stars were formed from the Hydrogen and Helium formed in the Big Bang were short lived massive Population III stars. In Physics, the Planck time ( tP) is the unit of Time in the system of Natural units known as Planck units. In Physical cosmology, the Planck epoch (or Planck era) named after Max Planck, is the earliest period of Time in the history of the Universe See also Cosmic inflation In Physical cosmology the inflationary epoch was the period in the evolution of the early universe when according to Inflation Grand Unification, grand unified theory, or GUT refers to any of several very similar unified field theories or models in Physics that In Particle physics, the electroweak interaction is the unified description of two of the four Fundamental interactions of nature Electromagnetism and the In Particle physics, a hadron ( from the ἁδρός hadrós, " stout, thick " ( Leptons are a family of fundamental Subatomic particles comprising the Electron, the Muon, and the Tauon (or tau particle as well as their In Physical cosmology, Big Bang nucleosynthesis (or primordial nucleosynthesis) refers to the production of nuclei other than those of H-1 (i A galaxy is a massive gravitationally bound system consisting of Stars an Interstellar medium of gas and dust, and Dark matter Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 Helium ( He) is a colorless odorless tasteless non-toxic Inert Monatomic Chemical The Big Bang is the cosmological model of the Universe that is best supported by all lines of scientific evidence and Observation. In Astronomy and Physical cosmology, the metallicity of an object is the proportion of its matter made up of Chemical elements other than Hydrogen Nuclear processes in these stars converted the Hydrogen and Helium into metals and other heavier elements. As the Population III stars died these heavier elements were released. In Astronomy and Physical cosmology, the metallicity of an object is the proportion of its matter made up of Chemical elements other than Hydrogen

Formation of Population II stars

Population II stars contain metals formed in the Population III stars. In Astronomy and Physical cosmology, the metallicity of an object is the proportion of its matter made up of Chemical elements other than Hydrogen In Astronomy and Physical cosmology, the metallicity of an object is the proportion of its matter made up of Chemical elements other than Hydrogen These were longer lived than the Population III stars and some of them are still around. In addition to the metals these inherited from the Population III stars the Population II stars also formed metals by nuclear reactions and when the stars died much of that material was returned to be used as the building blocks for the next generation of stars.

5 Billion Years ago - Formation of Population I stars

Population I stars are also known as metal rich stars. In Astronomy and Physical cosmology, the metallicity of an object is the proportion of its matter made up of Chemical elements other than Hydrogen Our own sun is a Population I star and was formed about 5 billion years ago.

Geologic time periods

Main articles: Geologic time scale and List of Global Boundary Stratotype Sections and Points

The geologic time scale covers the extent of the existence of Earth, from about 4600 million years ago to the present day. The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other This is a list of Global Boundary Stratotype Sections and Points. The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other It is marked by Global Boundary Stratotype Sections and Points. A Global Boundary Stratotype Section and Point, abbreviated GSSP, is an internationally agreed upon stratigraphic section which serves as the reference section for Geologic time units are (in order of descending specificity) eons, eras, periods, epochs, and ages; and the corresponding chronostratigraphic units, which measure "rock-time", are eonothems, erathems, systems, series, and stages. Chronostratigraphy is the branch of Stratigraphy that studies the age of rock strata in relation to Time.

The second and third timelines are each subsections of their preceding timeline as indicated by asterisks. The Cenozoic is sometimes divided into the Quaternary and Tertiary periods, although their use is no longer official. Overview The term Quaternary ("fourth" was proposed by Giovanni Arduino in 1759 for alluvial deposits in the Po river valley in northern The chuprichondira geological time interval covers roughly the time span between the demise of the non- avian Dinosaurs and beginning of the most recent Ice Age, approximately

Millions of Years

See also

• Chronology
• Exponential timeline shows all history on one page in ten lines. Definition A chronology may be either relative &mdashthat is locating related events relative to each other&mdashor ''absolute'' &mdashlocating A logarithmic timeline is a Timeline laid out according to a Logarithmic scale.
• Periodization for a discussion of the tendency to try to fit history into non-overlapping periods. Periodization is the attempt to categorize or divide Time into discrete named blocks
• List of fossil sites with link directory
• List of timelines

References

This is a worldwide list of important and/or well-known localities where Fossils have been found This is a list of Timelines. Types of timelines Living graph Logarithmic timeline

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