| Millennia: | 2nd millennium · 3rd millennium · 4th millennium |
| Centuries: | 21st century · 22nd century · 23rd century · 24th century · 25th century · 26th century · 27th century · 28th century · 29th century · 30th century |
In contemporary history, the third millennium is a period of time that commenced on January 1, 2001, and will end on December 31, 3000, of the Gregorian calendar. This is the third period of one thousand years in the Common Era.
As this millennium is currently in progress, its first two decades, the 2000s and 2010s, are the subject of the historian's attention. The remaining part of the 21st century and longer-term trends are researched in futurology.
| 21st century | 2000s[1] | 2010s | 2020s | 2030s | 2040s | 2050s | 2060s | 2070s | 2080s | 2090s |
| 22nd century | 2100s | |||||||||
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| 24th century | ||||||||||
| 25th century | ||||||||||
| 26th century | ||||||||||
| 27th century | ||||||||||
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| 29th century | ||||||||||
| 30th century |
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The 3rd millennium began on January 1, 2001 and will end on December 31, 3000.
   | A website arguing that the new millennium began on January 1, 2000 - When Did the New Millennium Begin? |
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