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  2. List of decades, centuries, and millennia - Wikipedia

    en.wikipedia.org/wiki/List_of_decades,_centuries...

    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 Logarithmic timeline .

  3. Millennium - Wikipedia

    en.wikipedia.org/wiki/Millennium

    Those holding that the arrival of the new millennium should be celebrated in the transition from 2000 to 2001 (i.e., December 31, 2000, to January 1, 2001) argued that the Anno Domini system of counting years began with the year 1 (there was no year 0) and therefore the first millennium was from the year 1 to the end of the year 1000, the ...

  4. AD 1000 - Wikipedia

    en.wikipedia.org/wiki/AD_1000

    1000 was a leap year starting on Monday of the Julian calendar, the 1000th year of the Common Era (CE) and Anno Domini (AD) designations, the 1000th and last year of the 1st millennium, the 100th and last year of the 10th century, and the 1st year of the 1000s decade. As of the start of 1000, the Gregorian calendar was 5 days ahead of the ...

  5. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    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 .

  6. 1st millennium - Wikipedia

    en.wikipedia.org/wiki/1st_millennium

    The first millennium of the anno Domini or Common Era was a millennium spanning the years 1 to 1000 (1st to 10th centuries; in astronomy: JD 1 721 425.5 – 2 086 667.5 [1]). The world population rose more slowly than during the preceding millennium , from about 200 million in the year 1 to about 300 million in the year 1000.

  7. Timeline of ancient history - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_ancient_history

    The date used as the end of the ancient era is arbitrary. The transition period from Classical Antiquity to the Early Middle Ages is known as Late Antiquity.Late Antiquity is a periodization used by historians to describe the transitional centuries from Classical Antiquity to the Middle Ages, in both mainland Europe and the Mediterranean world: generally from the end of the Roman Empire's ...

  8. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    About 31,709 years. megaannum: 10 6 yr: Also called "megayear". 1000 millennia (plural of millennium), or 1 million years (in geology, abbreviated as Ma). petasecond: 10 15 s: About 31 709 791 years. galactic year: 2.3 × 10 8 yr: The amount of time it takes the Solar System to orbit the center of the Milky Way Galaxy (approx 230 000 000 years ...

  9. 1000s - Wikipedia

    en.wikipedia.org/wiki/1000s

    The millennium from 1 January 1000, to 31 December 1999, almost synonymous with the 2nd millennium (1001–2000) The century from 1 January 1000, to 31 December 1099, almost synonymous with the 11th century (1001–1100) 1000s (decade), the decade from 1 January 1000, to 31 December 1009, almost synonymous with the 101st decade (1001–1010)