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Holocene calendar



Conversion to Holocene from Gregorian AD dates can be achieved by adding 10,000. BC dates are converted by subtracting the BC year from 10,001.

A useful validity check is that the last digit of BC and HE equivalents must add up to 1 or 11.

Events Gregorian years Holocene Era
Human Era
Neanderthals become extinct c. 22000 BC c. -12000 HE or c. 12000 BHE
End of the Paleolithic Period,
All continents (apart from Antarctica) inhabited,
Agriculture and the domestication of animals begins,
Alteration in the Earth's magnetic field occurs,
Possible extinction of last close human relatives		 c. 10001 BC c. 0 HE
Earliest walled city (Jericho) c. 9001 BC c. 1000 HE
Formation of English Channel c. 7001 BC c. 3000 HE
First copper found in Middle East - beginning of Copper Age c. 6001 BC c. 4000 HE
Possible creation of the Egyptian calendar 4242 BC 5759 HE
Probable date of the completion of the first Egyptian pyramid 2611 BC 7390 HE
Beginning of Xia Dynasty in China 2100 BC 7901 HE
Foundation of Athens 1235 BC 8766 HE
First Olympic Games 776 BC 9225 HE
Foundation of Rome 753 BC 9248 HE
Establishment of Athenian Democracy by Cleisthenes 508/7 BC 9493/4 HE
Battle of Marathon 490 BC 9511 HE
Battle of Salamis and battle of Thermopylae 480 BC 9521 HE
Trial of Socrates 399 BC 9602 HE
Battle of Chaeronea 338 BC 9663 HE
Last year of BC era 1 BC 10000 HE
First year of anno Domini era AD 1 10001 HE
Fall of Rome AD 476 10476 HE
Hindu-Arabic numerals introduced to Europe AD 1202 11202 HE
First World War AD 1914-1918 11914-11918 HE
Second World War AD 1939-1945 11939-11945 HE
Current year AD 2008 12008 HE
Last year of the current millennium AD 3000 13000 HE

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References

  • David Ewing Duncan (1999). The Calendar, 331–332. ISBN 1-85702-979-8. 
  • Cesare Emiliani (1993). Calendar reform. Nature, 366:716. 
  • Duncan Steel (2000). Marking Time: The Epic Quest to Invent the Perfect Calendar, pp.149-151. 
  • Günther A. Wagner (1998). Age Determination of Young Rocks and Artifacts: Physical and Chemical Clocks in Quaternary Geology and Archeology. Springer, p48. 
  • Timeline of World History
  • "News and comment", Geology Today, 20/3 (2004) 89–96.

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See also




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