39th century
Encyclopedia
The 39th century of the anno Domini
Anno Domini
and Before Christ are designations used to label or number years used with the Julian and Gregorian calendars....

 (common
Common Era
Common Era ,abbreviated as CE, is an alternative designation for the calendar era originally introduced by Dionysius Exiguus in the 6th century, traditionally identified with Anno Domini .Dates before the year 1 CE are indicated by the usage of BCE, short for Before the Common Era Common Era...

) era will span from January 1, 3801–December 31, 3900 of the Gregorian calendar
Gregorian calendar
The Gregorian calendar, also known as the Western calendar, or Christian calendar, is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words Inter...

. It will be the ninth century of the 4th millennium
4th millennium
The fourth millennium is a period of time that will begin on January 1, 3001, and will end on December 31, 4000, of the Gregorian calendar.-Centuries and Decades:* 31st century–3000s 3010s 3020s 3030s 3040s 3050s 3060s 3070s 3080s 3090s...

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