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3rd millennium
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4th millennium
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The is the third period of one thousand years in the
Common Era .
There are two ranges of dates which are recognised as the third millennium, depending on the start date, namely:
For those who start counting their calendar from
January 1 1 , then the began on
January 1 ,
2001 and will end on
December 31 ,
3000 in the sense of the
Gregorian Calendar or other calendars based on the
BC/AD system of
Calendar Eras .
In the sense of
Astronomical Year Numbering or the
ISO 8601 standard, both of which precede Year 1 with Year 0, the began on
January 1 ,
2000 and will end on
December 31 ,
2999 . The majority of the celebrations for the start of the occurred at
Midnight on
December 31 1999 /
January 1 2000 . The first decade of the new millennium (see below) contains the year
2000 .