Epochs (origin points for counting years)

(Dates using the astronomical year numbering system or ISO 8601.)

+879	Nepal Sambat
+640	Islamic
+638	Burmese
+632	Zoroastrian 'Yazdegirdi' (mainstream)
+622	Islamic. Several calendar variants, but all use the same Epoch. e.g. the Jalali.
+592	Bengali
+284	Era of Martyrs, aka Diocletian Era
+78	Hindu: Shaka era; Indian national calendar
+8	Ethiopian; Coptic
0	Christian (mainstream) - Dionysius Exiguus
-57	Hindu/Nepali: Vikram Samvat
-248	Parthian
-312	Seleucid era
-390	Zoroastrian (birth of Zoroaster)
-544	Buddhist (Buddha attains parinirvana) +/- 1 year
-568	Zoroastrian (old)
-691	Buddhist: Anjana Sakaraj (not to be used past -544)
-753	Rome (AUC)
-776	Olympiad
-951	Berber
-1167	Discordian
-1200	Iron Age
-1710	beginning of Ovid's Golden Age, according to Jerome
-1737	Zarathustrian (Age of Aries)
-2050	Augustine's mythikon start
-2137	Varro's mythikon start
-2300	Akkad (ultra-low chronology)
-2333	Dangi (Korean)
-2376	Censorinus's mythikon start
-2200	China
-2500	Indus valley
-2600	Sumer- earliest "real" king. Earliest "coherent texts"
-2697	China: Accession of the Yellow Emperor
-2900	the actual flood, useful for dating
-3050	Menes
-3100	Egypt, unified - First Dynasty
-3102	Hindu - Kali Yuga (mainstream) - ostensibly, death of Krishna
-3113	Maya Long Count: current creation cycle, the creation of humans
-3300	Bronze Age in the Near East
-3400	Egypt (or 3000). Earliest writing systems
-3500	earliest chronologies (Sumer, Mesopotamia)
-3761	Hebrew (mainstream) - the Hillel World Era, Anno Mundi. (Maimonides; Seder Olam Rabbah)
-3952	Creation, according to Bede
-4000	Creation - Judeo-Christian - Masoretic. Many variations, from 3616 to 4192. Famous: 4004 (Ussher). Anno Lucis of the Masons.
-4339	Creation - Jewish (Seder Olam Zutta)
-4714	Julian Day Numbering. This is an Epoch commonly used in astronomy.
-4750	Assyrian
-4963	Benedictine
-5199	Creation, according to some Christian sources, particularly Jerome following Eusebius.
-5500	Creation - Judeo-Christian - Septuagint. Many variations, including the following:
-5493	Christian: Alexandrian Era
-5509	Christian: Byzantine Etos Kosmou - since Creation
-5529	Creation, according to Theophilus of Antioch
-6600	earliest writing of any kind
-6984	Creation, according to Afonso X of Castile
-8000	neolithic revolution
-8239	Maya Long Count: start of previous cycle (which was terminated early)
-9600	Creation, according to mainstream Zoroastrianism (approx)
-9700	Holocene geological epoch
-10000	Holocene Era, aka Human Era. Jericho. The most recent Heinrich Event, H0. End of the last glacial period.
-10200	The Neolithic revolution; ASPRO Period 2.
-12000	ASPRO Period 1.
-17680	Creation, according to one Egyptian source (Syncellus)
-18000	Zarzian culture
-18000	Creation, according to one Egyptian source (Diodorus Siculus) (approx)
-20000	Epipaleolithic
-28000	Creation, according to Sumerian King List, if we interpret years to be months
-28000	Creation, according to one Egyptian source (Eusebius)
-30425	Creation, according to one Egyptian source (Schwaller)
-39000	Creation, according to one Chinese source (Xu Zheng) (approx)
-39550	Creation, according to one Egyptian source (Martianus Capella) (approx)
-39575	Creation, according to one Egyptian source
-39670	Creation, according to one Egyptian source
-49219	Creation, according to one Egyptian source (Laeretius)
-50000	Upper Paleolithic
-153000	Creation, according to Theophilus of Antioch (Apollonius) (approx)
-3891102	Hindu: Start of the current Yuga cycle