The Info List - Chronology

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(from Latin
chronologia, from Ancient Greek
Ancient Greek
χρόνος, chrónos, "time"; and -λογία, -logia)[2] is the science of arranging events in their order of occurrence in time. Consider, for example, the use of a timeline or sequence of events. It is also "the determination of the actual temporal sequence of past events".[3] Chronology
is part of periodization. It is also part of the discipline of history, including earth history, the earth sciences, and study of the geologic time scale.


1 Related fields 2 Calendar
and era

2.1 Ab Urbe condita era 2.2 Astronomical era

3 Prehistoric chronologies 4 Chronological synchronism 5 See also

5.1 Examples 5.2 Christian
chronology 5.3 General 5.4 Fiction writing

6 Notes 7 References 8 Further reading

8.1 Published in the 18th–19th centuries 8.2 Published in the 20th century 8.3 Published in the 21st century

9 External links

Related fields[edit] Chronology
is the science of locating historical events in time. It relies upon chronometry, which is also known as timekeeping, and historiography, which examines the writing of history and the use of historical methods. Radiocarbon dating
Radiocarbon dating
estimates the age of formerly living things by measuring the proportion of carbon-14 isotope in their carbon content. Dendrochronology
estimates the age of trees by correlation of the various growth rings in their wood to known year-by-year reference sequences in the region to reflect year-to-year climatic variation. Dendrochronology
is used in turn as a calibration reference for radiocarbon dating curves. Calendar
and era[edit] Main article: Calendar The familiar terms calendar and era (within the meaning of a coherent system of numbered calendar years) concern two complementary fundamental concepts of chronology. For example, during eight centuries the calendar belonging to the Christian
era, which era was taken in use in the 8th century by Bede, was the Julian calendar, but after the year 1582 it was the Gregorian calendar. Dionysius Exiguus (about the year 500) was the founder of that era, which is nowadays the most widespread dating system on earth. An epoch is the date (year usually) when an era begins. Ab Urbe condita era[edit] Main article: Ab urbe condita Ab Urbe condita is Latin
for "from the founding of the City (Rome)",[4] traditionally set in 753 BC. It was used to identify the Roman year by a few Roman historians. Modern historians use it much more frequently than the Romans themselves did; the dominant method of identifying Roman years was to name the two consuls who held office that year. Before the advent of the modern critical edition of historical Roman works, AUC was indiscriminately added to them by earlier editors, making it appear more widely used than it actually was. It was used systematically for the first time only about the year 400, by the Iberian historian Orosius. Pope Boniface IV, in about the year 600, seems to have been the first who made a connection between these this era and Anno Domini. (AD 1 = AUC 754.) Astronomical era[edit] Main article: Astronomical year numbering Dionysius Exiguus’ Anno Domini
Anno Domini
era (which contains only calendar years AD) was extended by Bede
to the complete Christian era
Christian era
(which contains, in addition all calendar years BC, but no year zero). Ten centuries after Bede, the French astronomers Philippe de la Hire
Philippe de la Hire
(in the year 1702) and Jacques Cassini
Jacques Cassini
(in the year 1740), purely to simplify certain calculations, put the Julian Dating System (proposed in the year 1583 by Joseph Scaliger) and with it an astronomical era into use, which contains a leap year zero, which precedes the year 1 (AD).[5] Prehistoric chronologies[edit] While of critical importance to the historian, methods of determining chronology are used in most disciplines of science, especially astronomy, geology, paleontology and archaeology. In the absence of written history, with its chronicles and king lists, late 19th century archaeologists found that they could develop relative chronologies based on pottery techniques and styles. In the field of Egyptology, William Flinders Petrie
William Flinders Petrie
pioneered sequence dating to penetrate pre-dynastic Neolithic
times, using groups of contemporary artefacts deposited together at a single time in graves and working backwards methodically from the earliest historical phases of Egypt. This method of dating is known as seriation. Known wares discovered at strata in sometimes quite distant sites, the product of trade, helped extend the network of chronologies. Some cultures have retained the name applied to them in reference to characteristic forms, for lack of an idea of what they called themselves: "The Beaker People" in northern Europe during the 3rd millennium BCE, for example. The study of the means of placing pottery and other cultural artifacts into some kind of order proceeds in two phases, classification and typology: Classification creates categories for the purposes of description, and typology seeks to identify and analyse changes that allow artifacts to be placed into sequences.[6] Laboratory techniques developed particularly after mid-20th century helped constantly revise and refine the chronologies developed for specific cultural areas. Unrelated dating methods help reinforce a chronology, an axiom of corroborative evidence. Ideally, archaeological materials used for dating a site should complement each other and provide a means of cross-checking. Conclusions drawn from just one unsupported technique are usually regarded as unreliable. Chronological synchronism[edit] The fundamental problem of chronology is to synchronize events. By synchronizing an event it becomes possible to relate it to the current time and to compare the event to other events. Among historians, a typical need to is to synchronize the reigns of kings and leaders in order to relate the history of one country or region to that of another. For example, the Chronicon of Eusebius (325 A.D.) is one of the major works of historical synchronism. This work has two sections. The first contains narrative chronicles of nine different kingdoms: Chaldean, Assyrian, Median, Lydian, Persian, Hebrew, Greek, Peloponnesian, Asian, and Roman. The second part is a long table synchronizing the events from each of the nine kingdoms in parallel columns. The image to the right shows two pages from the second section. By comparing the parallel columns, the reader can determine which events were contemporaneous, or how many years separated two different events. To place all the events on the same time scale, Eusebius used an Anno Mundi
Anno Mundi
(A.M.) era, meaning that events were dated from the supposed beginning of the world as computed from the Book of Genesis in the Hebrew Pentateuch. According to the computation Eusebius used, this occurred in 5199 B.C. The Chronicon of Eusebius was widely used in the medieval world to establish the dates and times of historical events. Subsequent chronographers, such as George Syncellus (died circa 811), analyzed and elaborated on the Chronicon by comparing with other chronologies. The last great chronographer was Joseph Justus Scaliger (1540-1609) who reconstructed the lost Chronicon and synchronized all of ancient history in his two major works, De emendatione temporum (1583) and Thesaurus temporum (1606). Much of modern historical datings and chronology of the ancient world ultimately derives from these two works.[7] Scaliger invented the concept of the Julian Day
which is still used as the standard unified scale of time for both historians and astronomers.[citation needed] In addition to the literary methods of synchronism used by traditional chronographers such as Eusebius, Syncellus and Scaliger, it is possible to synchronize events by archaeological or astronomical means. For example, the Eclipse of Thales, described in the first book of Herodotus
can potentially be used to date the Lydian War because the eclipse took place during the middle of an important battle in that war. Likewise, various eclipses and other astronomical events described in ancient records can be used to astronomically synchronize historical events.[8] Another method to synchronize events is the use of archaeological findings, such as pottery, to do sequence dating. See also[edit]


List of timelines – specific chronologies Timeline
of world history – overall historical chronology


Dionysius Exiguus' Easter
table Easter Lunar cycle Millennium question Paschal full moon Solar cycle


French revolutionary era Historiography

Fiction writing[edit] Aspects and examples of non-chronological story-telling:

Flashback Flashforward Linearity (writing) Reverse chronology


^ Richards, E. G. (1998). Mapping Time: The Calendar
and History. Oxford: Oxford University Press. pp. 12–13. ISBN 0-19-286205-7.  ^  Chisholm, Hugh, ed. (1911). "Chronology". Encyclopædia Britannica. 6 (11th ed.). Cambridge University Press. p. 305.  ^ Memidex/WordNet, "chronology," memidex.com (accessed September 25, 2010). ^ Literally translated as "From the city having been founded". ^ Richards 2013, pp. 591-592. ^ Greene, Kevin (November 2007). Archaeology : An Introduction. University of Newcastle Upon Tyne. Chapter 4. Retrieved 2008-01-04.  ^ Grafton, Anthony (1994). Joseph Scaliger: A Study in the History
of Classical Scholarship. Oxford: Oxford University Press.  ^ Kelley, David H. (2011). Exploring Ancient Skies: A Survey of Ancient and Cultural Astronomy. Springer. p. 614. ISBN 978-1441976239. 


Hegewisch, D. H., & Marsh, J. (1837). Introduction to historical chronology. Burlington [Vt.]: C. Goodrich. B. E. Tumanian, “Measurement of Time
in Ancient and Medieval Armenia,” Journal for the History
of Astronomy
5, 1974, pp. 91–98. Kazarian, K. A., “ History
of Chronology
by B. E. Tumanian,” Journal for the History
of Astronomy, 4, 1973, p. 137 Porter, T. M., "The Dynamics of Progress: Time, Method, and Measure". The American Historical Review, 1991.

Further reading[edit] Published in the 18th–19th centuries[edit]

Weeks, J. E. (1701). The gentleman's hour glass; or, An introduction to chronology; being a plain and compendious analysis of time. Dublin: James Hoey. Hodgson, J., Hinton, J., & Wallis, J. (1747). An introduction to chronology:: containing an account of time; also of the most remarkable cycles, epoch's, era's, periods, and moveable feasts. To which is added, a brief account of the several methods proposed for the alteration of the style, the reforming the calendar, and fixing the true time of the celebration of Easter. London: Printed for J. Hinton, at the King's Arms in St Paul's Church-yard. Smith, T. (1818). An introduction to chronology. New York: Samuel Wood.

Published in the 20th century[edit]

Keller, H. R. (1934). The dictionary of dates. New York: The Macmillan company. Poole, R. L., & Poole, A. L. (1934). Studies in chronology and history. Oxford: Clarendon Press. Langer, W. L., & Gatzke, H. W. (1963). An encyclopedia of world history, ancient, medieval and modern, chronologically arranged. Boston: Houghton Mifflin. Momigliano, A. "Pagan and Christian
in the Fourth Century
A.D." in A. Momigliano, ed., The Conflict Between Paganism and Christianity in the Fourth Century,The Clarendon Press, Oxford, 1963, pp. 79–99 Williams, N., & Storey, R. L. (1966). Chronology
of the modern world: 1763 to the present time. London: Barrie & Rockliffe. Steinberg, S. H. (1967). Historical tables: 58 B.C.-A.D. 1965. London: Macmillan. Freeman-Grenville, G. S. P. (1975). Chronology
of world history: a calendar of principal events from 3000 BC to AD 1973. London: Collings. Neugebauer, O. (1975). A History
of Ancient Mathematical Astronomy Springer-Verlag. Bickerman, E. J. (1980). The Chronology
of the Ancient World. London: Thames and Hudson. Whitrow, G. J. (1990). Time
in history views of time from prehistory to the present day. Oxford [u.a.]: Oxford Univ. Press. Aitken, M. (1990). Science-Based Dating in Archaeology. London: Thames and Hudson. Richards, E. G. (1998). Mapping Time: The Calendar
and History. Oxford University Press.

Published in the 21st century[edit]

Koselleck, R. " Time
and History." The Practice of Conceptual History. Timing History, Spacing Concepts. Palo Alto: Stanford University Press, 2002. Ronald H. Fritze; et al. (2004). "Chronologies, Calendars, and Lists of Rulers". Reference Sources in History: An Introductory Guide (2nd ed.). ABC-CLIO. pp. 4+. ISBN 978-0-87436-883-3.  Olena V. Smyntyna (2009). "Chronology". In H. James Birx. Encyclopedia of Time: Science, Philosophy, Theology, & Culture. Sage. ISBN 978-1-4129-4164-8.  Daniel Rosenberg; Anthony Grafton
Anthony Grafton
(2009). Cartographies of Time: A History
of the Timeline. New York: Princeton Architectural Press. ISBN 9781568987637 inconsistent citations  

External links[edit]

Look up chronology in Wiktionary, the free dictionary.

Dating the Past Pragmatic Bayesians: a decade of integrating radiocarbon dates in chronological models from the University of Sheffield
University of Sheffield
at the Internet Archive. Accessed 2008-01-04. Open Library. Works related to chronology  Herbermann, Charles, ed. (1913). "General Chronology". Catholic Encyclopedia. New York: Robert Appleton Company.  Chattopadhyay, Subhasis. Chronicity and Temporality: A Revisionary Hermeneutics of Time
in Prabuddha Bharata
Prabuddha Bharata
or Awakened India 120 (10):606-609 (2015). ISSN 0032-6178

v t e


Key concepts


history deep time

Present Future Futures studies Far future in religion Far future in science fiction and popular culture Timeline
of the far future Eternity Eternity
of the world

Measurement and standards


UTC UT TAI Unit of time Planck time Second Minute Hour Day Week Month Season Year Decade Century Millennium Tropical year Sidereal year Samvatsara

Measurement systems

zone Six-hour clock 12-hour clock 24-hour clock Daylight saving time Solar time Sidereal time Metric time Decimal time Hexadecimal time


Gregorian Julian Hebrew Islamic Lunar Solar Hijri Mayan Intercalation Leap second Leap year


Horology History
of timekeeping devices Main types

astrarium atomic


marine sundial sundial markup schema watch water-based

Chronology History

Astronomical chronology Big History Calendar
era Chronicle Deep time Periodization Regnal year Timeline

Religion Mythology

Dreamtime Kāla Kalachakra Prophecy Time
and fate deities Wheel of time Immortality

Philosophy of time

A-series and B-series B-theory of time Causality Duration Endurantism Eternal return Eternalism Event Multiple time dimensions Perdurantism Presentism Static interpretation of time Temporal finitism Temporal parts The Unreality of Time

Human experience and use of time

Accounting period Chronemics Fiscal year Generation time Mental chronometry Music Procrastination Punctuality Temporal database Term Time
discipline Time
management Time

Specious present

Time-tracking software Time-use research Time-based currency
Time-based currency
(time banking) Time
value of money Time
clock Timesheet Yesterday – Today – Tomorrow



Geological time

age chron eon epoch era period

Geochronology Geological history of Earth


Absolute time and space Arrow of time Chronon Coordinate time Imaginary time Planck epoch Planck time Proper time Rate Spacetime Theory of relativity Time


domain Time
translation symmetry Time
reversal symmetry

other subject areas

Chronological dating Chronobiology Circadian rhythms Dating methodologies in archaeology Time

Related topics

Carpe diem Clock
position Space System time Tempus fugit Time
capsule Time
complexity Time
signature Time

portal Category

v t e


Key topics

Archaeology Astronomy Geology History Paleontology Time

Eras Epochs


Human Era Ab urbe condita Anno Domini / Common Era Anno Mundi Byzantine era Seleucid era Spanish era Before Present Hijri Egyptian Sothic cycle Hindu units of time
Hindu units of time
(Yuga) Mesoamerican

Long Count Short Count Tzolk'in Haab'

Regnal year

Canon of Kings Lists of kings Limmu

Era names

Chinese Japanese Korean Vietnamese


Pre-Julian / Julian

Pre-Julian Roman Original Julian Proleptic Julian Revised Julian


Gregorian Proleptic Gregorian Old Style and New Style dates Adoption of the Gregorian calendar Dual dating


Lunisolar Solar Lunar Astronomical year numbering


Chinese sexagenary cycle Geologic Calendar Hebrew Iranian Islamic ISO week date Mesoamerican

Maya Aztec

Winter count
Winter count
(Plains Indians)

Astronomic time

Cosmic Calendar Ephemeris Galactic year Metonic cycle Milankovitch cycles

Geologic time


Deep time Geological history of Earth Geological time units


Global Standard Stratigraphic Age (GSSA) Global Boundary Stratotype Section and Point (GSSP)


Chronostratigraphy Geochronology Isotope
geochemistry Law of superposition Luminescence dating Samarium–neodymium dating

Chronological dating

Absolute dating

Amino acid racemisation Archaeomagnetic dating Dendrochronology Ice core Incremental dating Lichenometry Paleomagnetism Radiometric dating

Radiocarbon Uranium–lead Potassium–argon

Tephrochronology Luminescence dating Thermoluminescence dating

Relative dating

Fluorine absorption Nitrogen dating Obsidian hydration Seriation Stratigraphy

Genetic methods

Molecular clock

Linguistic methods


Related topics

Chronicle New Chronology Periodization Synchronoptic view Timeline Year
zero Circa Floruit Terminus post quem ASPRO chronology