What happened 4715 years ago? In Chinese myth and religion, apparently 2698 BC (on the Gregorian calendar) was the beginning of the reign of the Yellow Emperor, thought to be the "initiator of Chinese civilization" according to Wikipedia. That's not to say that the Chinese didn't exist before then, but his place at the beginning of their calendar at least signifies an important distinction between what came before and everything after. Of course, there are a LOT of historical reasons for the way the current Chinese calendar is formulated.
Placing Year One on a calendar at the beginning of civilization makes a lot of sense. Calendars are an invention of civilization. They don't just tell time, they tell a story about the culture it belongs to. For example, the current year on the Hebrew calendar is 5777, with Year One taking place a year before the creation of the world in the Jewish myth of Genesis.
The calendar used all over the world today, the Gregorian Calendar, is of course a Christian invention, placing Year One at the birth of Jesus of Nazareth. This calendar frames the history of Western civilization, and indeed the entire world, as the story of a Christian world. But civilization as a whole is far older than that. Why should the world run on a calendar based around a religion followed only by a third of the people in it?
I think there's something very satisfying about placing Year One at the beginning of civilization, as it marks the beginning of humanity as we know it today. The distinction is important, as humanity was thought to have achieved "behavioral modernity" about 50,000 years ago, which means that the project of civilization itself is a a relatively new one in the history of our species. We are still sorting through the various ways the environment of civilization has forced us to evolve, be it physically, mentally, socially, or otherwise.
But when to put Year One on the calendar of civilization? Western civilization is thought to have its roots in ancient Mesopotamia (meaning "between rivers": the Tigris and Euphrates, located in current-day Iraq and Syria). The first civilization to be founded there is thought to be Sumer, from which we get the story of Gilgamesh.
There's no exact date on the founding of Sumerian civilization, as written records from that time didn't emerge until a good while after the Sumerians arrived on the scene. Additionally, there is some debate among historians about when to place such a date, with some saying around 4000 BC and some saying a good deal older. However, that ~4000 BC date seems to be what is conventionally accepted, as it is the beginning of the Uruk period, named after the city of Uruk, thought to be the oldest of the Sumerian cities. Additionally, the fourth millennium BC is the beginning of the Bronze age, marking a significant departure in human development.
So, if one wanted to create a calendar based on the story of civilization (or at least Western civilization, though the Chinese and Indians popped up separately and around the same time as the Mesopotamians), one might simply add 4000 to our current year, which would make this year 6017. That's 6,017 years of organized agriculture, social stratification, government, written history, taxes, population density, specialist occupations, and politics, things we all take for granted today. That's 6,017 years out of 50,000 years of behavioral modernity, a mere 12% of the existence of humanity.
I think this is a fascinating, and even useful, formulation of time. In today's world we are still dealing with the problems posed by civilization, be it social stratification, the concentration of power, the effect on the environment, and the roles that it forces us into in order to survive. And there's a rich history in those 4000 unacknowledged years, from which the basis of our culture today was formed. I think we are better off looking at the bigger picture.
Here are some important historical dates revised with 4000BC as Year One (subtract all BC years from 4001). I separated them by millennia. I know this is lacking quite a lot, and it's very U.S.-centric, but I'm not trying to give a history of the whole world here. Significant dates in the history of the Roman Empire are in bold because of the through-line it makes in Western history.
FIRST MILLENNIUM - Early Bronze Age - 4000 BC
- ~0: Theoretical Proto-Indo-European Homeland located north of the Caucasus and Black Sea
- 1: Sumerian Civilization in Mesopotamia (Uruk period)
- 239: Beginning of Hebrew calendar
- 801: Invention of writing in Egypt and Mesopotamia
- 851: Unification of Egypt and founding of First Dynasty
SECOND MILLENNIUM - Bronze Age - 3000 BC
- 1000: Hittites (Proto-Indo-European-speaking steppe herders) move into Anatolia
- 1111: Second Dynasty of Egypt
- 1200~1500: Estimated date that Gilgamesh ruled Uruk
- 1300: Minoan Greek Bronze Age
- 1303: Beginning of the reign of the Yellow Emperor in China. Start of the Chinese calendar
- 1461: Great Pyramid of Giza built during Fourth Dynasty of Egypt
- 1503: Fifth Dynasty of Egypt
- 1651: Akkad arises from Sumeria
- 1871: Tenth Dynasty of Egypt
- 1900: Sumerian poems of the Epic of Gilgamesh dated to around this time
- 1951: Assyria gains independence from Sumeria
|~1300 BC, or ~2700 HC|
THIRD MILLENNIUM - Middle-Late Bronze Age, Collapse, Early Iron Age - 2000 BC
- 2000: Canaanite city-states founded in the Levant
- 2107: Babylon arises from Akkad
- 2400: Labarna I founds the Hittite Old Kingdom in Anatolia
- 2400: Mycenaean Greece
- 2689 - 2729: Writing of the Torah
- 2600: Hittite civilization enters the "Hittite Empire" period with reign of Tudhaliya I
- 2722: Ramesses II rules Egypt as part of Nineteenth Dynasty
- 2807~2817: Estimated date of Trojan war
- 2824: Bronze Age Collapse, connected to the Sea Peoples, affects Egypt, Greece, Hittites, and much of the Mediterranean. The Greeks lose the ability to write.
- 2976: King Saul rules the Kingdom of Israel and Judah, followed by David and Solomon (estimated)
FOURTH MILLENNIUM - Late Iron Age, "Axial Age," Classical Antiquity - 1000 BC
- 3041: Solomon's temple in Jerusalem completed
- 3200s: Greeks adopt alphabet from Phoenicians, who have colonies all over the mediterranean
- 3240 - 3290s: The Iliad is written, followed soon by the Odyssey
- 3248: Founding of Roman Kingdom
- 3261: Assyria conquers Israel
- 3396: Jewish Babylonian captivity
- 3396 - 3439: Nebuchadnezzar II rules Babylon as king, during which the Hanging Gardens were said to have been built.
- 3407: Athenian Greek Democracy
- 3415: Destruction of Solomon's Temple by Babylon Empire
- 3434: Birth of Buddha
- 3451: Zoroaster, founding of Achaemenid empire in Persia
- 3462: Fall of Babylon to Achaemenid Empire, Cyrus the Great releases the captive Jews the next year
- 3476: Fall of Egypt to Achaemenid Empire
- 3485: Second Temple in Jerusalem constructed
- 3492: Founding of Roman Republic
- 3511: Battle of Marathon between Greece and Achaemenid Empire
- 3518: Death of Buddha
- 3521: Battle of Thermopylae, second invasion of Greece by Achaemenid empire
- 3523 - 3597: Golden Age of Athens
- 3561: Herodotus' Histories published
- 3570 - 3597: Peloponnesian War between Athens and Sparta
- 3642 - 3664: Philip II rules Macedon and unites most of Greece into the Hellenic League
- 3669: Alexander the Great conquers Egypt, then Judea, the next year conquers Achaemenid Empire
- 3678: Alexander dies, leaving behind a fractured empire. His general Ptolemy gets Egypt
- 3737 - 3855: The Punic Wars are fought between Rome and Carthage (Phoenicians)
- 3721 - 3871: Septuagint (Greek translation of the Hebrew Bible) written
- 3855: Roman rule of Greece
- 3956: Julian Calendar adopted (709 AUC - 709 years since founding of Rome)
- 3957: Death of Julius Caesar
- 3971: Ptolemaic Egypt falls to Rome
- 3972 - 3982: Virgil writes the Aeneid
- 3974: Founding of Roman Empire
- 3997: Jesus of Nazareth is born
FIFTH MILLENNIUM - Late Antiquity and the Early Middle Ages/"Dark Ages" - 0 AD
- 4030: Jesus executed by Rome for the crime of sedition
- 4070: Rome besieges Jerusalem and destroys the Second Temple. Books of the New Testament written in Greek.
- 4096 - 4180: Reign of the Five Good Emperors of Rome: Nerva, Trajan, Hadrian, Antoninus Pius, and Marcus Aurelius
- 4284: Emperor Diocletian splits Rome in two, with the eastern capital in Byzantium, later called Constantinople
- 4325: First Council of Nicaea, organized by Emperor Constantine
- 4391: Library of Alexandria in Egypt destroyed by imperial decree against paganism
- 4434 - 4453: Attila rules the Huns, invades Europe, dies
- 4476: Fall of Western Rome during age of Germanic migration
- 4571 - 4632: Life of Mohammed. He and his followers take over the Arabian Peninsula. Rashidun Caliphate established after death.
- 4632 - 4661: Rashidun Caliphate takes the Levant and Egypt from the Eastern Roman (Byzantine) Empire and conquers the Sassanid Empire in Persia.
- 4661 - 4750: Umayyad Caliphate established, conquers land from Iberian Peninsula and Northern Africa to the west, to the Indus Valley to the east, and Caucasus mountains to the north.
- 4718: Reconquista begins on the Iberian Peninsula with the Battle of Covadonga
- 4786: Islamic Golden Age begins with reign of Abbasid caliph Harun al-Rashid and the inauguration of the House of Wisdom in Baghdad, a major intellectual center in the middle ages
- 4793: Viking age begins
- 4800: Coronation of Charlemagne, beginning of France and Holy Roman Empire
- 4860: Rurik, a Varangian (eastern viking) chieftan, establishes Novgorod as his capital
- 4882 - 4912: Oleg of Novgorod expands territory and moves capital to Kiev, creating the Kievan Rus'
- 4988: Vladimir the Great Christianizes the Kievan Rus'
SIXTH MILLENNIUM - High-Late Middle Ages, Early Modern Era - 1000 AD
- 5066: William the Conqueror, a Norman, invades and rules England
- 5068: Seljuk Empire takes Anatolia from Byzantine Empire as part of its expansion from Persia
- 5095 - 5192: First - Third Crusades
- 5202 - 5204: Fourth Crusade, including sacking of Constantinople
- 5215: Signing of the Magna Carta
- 5232 - 5240: Mongol Empire invades Kievan Rus' in eastern Europe, destroying many of its cities and placing it under control of the Golden Horde
- 5258: Islamic Golden Age ends with the Siege of Baghdad by the Mongols
- 5270s: Codex Regius, the primary source for much of Viking poetry and lore, transcribed
- 5299: Osman I founds and rules the Ottoman dynasty in Anatolia
- ~5300 - ~5600: The Renaissance
- 5337 - 5453: Hundred Years' War between England and France
- 5346 - 5353: The Black Death
- 5453: Fall of Byzantine Empire (Eastern Rome) to Mehmet the Conquerer, 7th Sultan of the Ottoman Empire
- 5462 - 5505: The grand prince of Moscow, Ivan the Great, consolidates Rus' lands, ends the reign of the Golden Horde over the Rus', marries a niece of the last Byzantine emperor, and calls himself Tsar
- 5475: The Printing Press
- 5492: Columbus discovers America. End of Reconquista in Spain.
- 5517: Protestant Reformation
- 5520: By the time of his death, Selim I, 9th Sultan of the Ottoman Empire, conquers the Middle East, including the Levant, Egypt, and the Arabian Peninsula
- 5541: Suleiman the Magnificent, 10th Sultan of the Ottoman Empire, annexes most of Hungary
- 5547 - 5584: Ivan the Terrible, first Tsar of All the Russias, expands territory and creates an empire
- 5582: Gregorian Calendar adopted
- 5618 - 5648: Thirty Years' War
- 5650: Age of Enlightenment/Scientific Revolution
- 5682 - 5725: Peter the Great rules as Tsar of Russia, westernizing the country by introducing Enlightenment-based reforms. He founds Saint Petersburg in 5703 and the Russian Empire in 5721
- 5707: Scotland and England form Great Britain
- 5754 - 5763: Seven Years' War (French and Indian War in America), after which France cedes all North American territory to Great Britain
- 5760: Industrial Revolution
- 5775 - 5783: American Revolutionary War
- 5776: Declaration of Independence by United States
- 5789: Adoption of Constitution by the United States
- 5789 - 5799: French Revolution
- 5800: Ireland and Great Britain form the United Kingdom of Great Britain and Ireland
- 5803: Louisiana Purchase (United States)
- 5804: Napolean titled Emperor of France
- 5806: Fall of Holy Roman Empire to Napolean
- 5810 - 5821: Mexican war of Independence
- 5821: Greece gains independence from Ottoman Empire
- 5836: Texas revolution, gains independence from Mexico
- 5845 - 5848: The United States annexes Texas and goes to war with Mexico, which results in the additions of land from Texas to the west coast.
- 5861 - 5865: U.S. Civil War and end of slavery
- 5870 - 5871: Franco-Prussian War, resulting in formation of French Republic and German Empire
- 5876: Canadian Independence
- 5914 - 5918: World War I
- 5917: Russian Revolution
- 5920: British Empire controls about a quarter of the land on Earth
- 5922: Ireland becomes its own state
- 5920: Women granted right to vote (U.S.)
- 5939 - 5945: World War II
- 5963: Civil Rights (U.S.)
- 5990: Widespread use of the Internet
SEVENTH MILLENNIUM - Contemporary History
- 6001: 9/11
- 6017: Donald Trump's presidency begins
EDIT: A friend just sent me the following video, proposing a different scheme for setting the era.
I personally prefer starting the calendar at the beginning of Sumerian civilization for my reason stated above, that the calendar itself is an invention of civilization, and civilization itself was a major turning point for humanity in that it permanently altered our environment. As the Indus Valley civilization and Chinese civilizations were getting started around the same time, it would be just as inclusive. Instead of HE: the Human Era, I'd propose HC: Human Civilization. All prehistoric achievements like the first temples would be marked as BHC.
Edit 2: This video rules:
Edit 2: This video rules: