4th millennium

Millennia:	3rd millennium · 4th millennium · 5th millennium
Centuries:	31st century · 32nd century · 33rd century · 34th century · 35th century · 36th century · 37th century · 38th century · 39th century · 40th century

The fourth millennium is the millennium that will start on January 1, 3001 and will end on December 31, 4000 of the Gregorian calendar.