Holocene calendar

"Holocene era" redirects here. For the geological epoch, see Holocene. Calendar era such that 2000 CE is 12000 HE (“Holocene era”) ↓ Future ::

The Holocene calendar, also known as the Holocene Era or Human Era (HE), is a year numbering system that adds exactly 10,000 years to the currently dominant (AD/BC or CE/BCE) numbering scheme, placing its first year near the beginning of the Holocene geological epoch and the Neolithic Revolution, when humans transitioned from a hunter-gatherer lifestyle to agriculture and fixed settlements. The current year by the Gregorian calendar, AD 2021, is 12021 HE in the Holocene calendar. The HE scheme was first proposed by Cesare Emiliani in 1993 (11993 HE).



Cesare Emiliani's proposal for a calendar reform sought to solve a number of alleged problems with the current Anno Domini era, which number the years of the commonly accepted world calendar. These issues include:

  • The Anno Domini era is based on the erroneous estimation of the birth year of Jesus. The era places Jesus's birth year in AD 1, but modern scholars have determined that he was likely born in or before 4 BC. Emiliani argued that replacing it with the approximate beginning of the Holocene makes more sense.
  • The birth date of Jesus is a less universally relevant epoch event than the approximate beginning of the Holocene.
  • The years BC/BCE are counted down when moving from past to future, making calculation of time spans difficult.
  • The Anno Domini era has no year zero, with 1 BC followed immediately by AD 1, complicating the calculation of timespans further. This is equally true of the Common Era, its non-religious equivalent.

Instead, HE uses the "beginning of human era" as its epoch, arbitrarily defined as 10,000 BC and denoted year 1 HE, so that AD 1 matches 10,001 HE. This is a rough approximation of the start of the cur... ...read more

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Holocene ... concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified...

Gregorian calendar
1 month ago

Gregorian calendar ... Gregorian calendar: Holocene calendar International Fixed Calendar (also called the International Perpetual calendar) World Calendar World Season Calendar Leap...

Solar calendar
5 months ago

Solar calendar ... Soviet calendar World Calendar Pax Calendar Pataphysical calendar Discordian calendar World Season Calendar Holocene calendar Juche era calendar Symmetry454...

Calendar era
4 months ago

Calendar era ... calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. For example, the Gregorian calendar numbers...

4 months ago

Calendar ... World Calendar, International Fixed Calendar, Holocene calendar, and, recently, the Hanke-Henry Permanent Calendar. Such ideas are mooted from time to...

List of calendars
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List of calendars ... This is a list of calendars. Included are historical calendars as well as proposed ones. Historical calendars are often grouped into larger categories...

Anno Domini
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Anno Domini ... investigation before being converted to BC or AD. Before Present Holocene calendar The words "anno" and "before" are often capitalized, but this is considered...

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Epoch ... creation Epoch (astronomy), Epoch (geology), Epoch (computing) Holocene calendar, Lunisolar calendar Metonic cycle, Saros (astronomy) Timekeeping on Mars Blackburn...

10th millennium BC
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10th millennium BC ... officially divided into the Pleistocene and Holocene Series/Epochs. The Holocene has been assigned an age of 11,700 calendar years before 2000 CE which means it...

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536 ... (Roman numerals: DXXXVI) was a leap year starting on Tuesday of the Julian calendar. At the time, it was known as the Year after the Consulship of Belisarius...

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List of North American animals extinct in the Holocene
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Calendar reform
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AD 1
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