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January 1st 2001
- So the 3rd Millennium and the 21st Century actually start at the same moment, which is zero hour UTC (commonly known as GMT) on January 1st 2001.
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In contemporary history, the third millennium is the current millennium in the Anno Domini or Common Era, under the Gregorian calendar. It began on 1 January 2001 ( MMI ) and will end on 31 December 3000 ( MMM ), spanning the 21st to 30th centuries.
The year number in the Gregorian calendar was about to tick over to 2000, supposedly ushering in not only the 21st century but also the 3rd millennium CE. However, the party was held one year too early—it should have been on January 1, 2001.
37th century BC: 36th century BC: 35th century BC: 34th century BC: 33rd century BC: 32nd century BC: 31st century BC: 3rd millennium BC · 3000–2001 BC 30th century BC: 29th century BC: 28th century BC: 27th century BC: 26th century BC: 25th century BC: 24th century BC: 23rd century BC: 22nd century BC: 21st century BC: 2nd millennium BC ...
Dec 20, 1999 · There was no year 0. Before A.D.1 came the year B.C.1. Thus, the first century ran for 100 years from A.D.1 until the end of A.D. 100; the first millennium, from A.D.1 until...
May 5, 2024 · Thus, the 1st millennium is defined as spanning years 1–1000 and the 2nd the years 1001–2000. Although numerous popular celebrations marked the start of the year 2000, the 21st century and 3rd millennium ad began on January 1, 2001.
- The Editors of Encyclopaedia Britannica
The start of the 21st century and 3rd millennium was celebrated worldwide at the start of the year 2000.
Centuries: 21st century · 22nd century · 23rd century · 24th century · 25th century · 26th century · 27th century · 28th century · 29th century · 30th century. The 3rd millennium began on January 1, 2001 and will end on December 31, 3000 .
