|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|
The 3rd millennium is a the current millenium. It started on January 1, 2001 and will end on December 31, 3000 of the Gregorian calendar. The third decade, the present 2020s, are what historian's are currently interested in. The rest of the 21st century and the time after that are researched in futures studies.