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As for example, the year 2697 BC (or −2696, using the astronomical year count), traditionally the first year of the reign of the legendary Yellow Emperor, was the first year (甲子; jiǎzǐ) of a cycle. 2700 years later in 4 AD, the duration equivalent to 45 60-year cycles, was also the starting year of a 60-year cycle. Similarly 1980 years ...
Ancient history – Aggregate of past events from the beginning of recorded human history and extending as far as the Early Middle Ages or the Postclassical Era. The span of recorded history is roughly five thousand years, beginning with the earliest linguistic records in the third millennium BC in Mesopotamia and Egypt .
List of years; Timelines of world history; List of timelines; Chronology; See calendar and list of calendars for other groupings of years. See history, history by period, and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang, Geologic time scale, Timeline of evolution, and ...
Timeline of history of environmentalism (630s – present) Weather and environmental disasters. Lists of earthquakes by period; List of tornado events by year; List of wildfires; Life. Timeline of the evolutionary history of life; List of years in birding and ornithology; List of years in paleontology (17th century – present) 2025 in paleontology
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history
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 ...
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The adoption of the Sexagenarian Law produced few practical effects since only a minority of Brazilian slaves were over 60 years old. [1] [20] In 1872, the life expectancy of the general population was 27.4 years, while that of the slaves was 21 years. [21] In 1887, out of a total of 723 thousand slaves, only 28.8 thousand were over 55 years ...