Third Millennium

The Third Millennium was the time period wherein various important events in modern history took place, including the Century War, the rise of the Averte Statum, the Great Unification, the creation of the World Empire, the Dark Ages, the Settlement, the Sleeper Age and the Superluminal Age.

Definition
The term Third Millennium usually referred to the period in the Gregorian Calendar, the calendric system that preceded the Standard Calendar, which was introduced by the Averte Statum.

It referred to the thousand year period beginning in Gregorian year 2000 and ending in the Gregorian year 2999).

The Third Millennium was distinct from the 21st century (years 2000-2099) and the 2000s (a decade lasting from year 2000 to 2009).

History
It is known that the First Century BU, the First Century AU, the Second Century AU, the Third Century AU and the Fourth Century AU all occurred during the Gregorian Third Millennium.

The Third Millennium (Gregorian Calendar) coincided with at least the first half of the First Millennium (Standard Calendar).

By 100 AU, most of the population of Earth was unfamiliar with the Gregorian Calendar, although the term Third Millennium was still colloquially used to refer to the "current age".