21st century

Notes

• The 21st century was, as Jack Harkness cryptically said, "when everything changes". (TW: Everything Changes). Among other things, this refers to the fact that the early 21st century was when the human race on Earth learned as a whole that alien life existed. (DW: The Christmas Invasion; earlier chronicled invasions including that seen in The Invasion and Aliens of London/World War Three were believed to have been hoaxes by the general public, or otherwise covered up (DW: Remembrance of the Daleks)
• This century, generally defined in Earth's calendar as covering the years 2001 to 2100, was a period of great technological advancement, but also great political, economic, and ecological turmoil. The T-Mat and the Gravitron were developed in the middle part of this century, with the first excursions outside the Solar System occurring towards the century's end.
• In 2009, the Earth was relocated to the Medusa Cascade by the Daleks, causing untold damage around the world, which nonetheless unified in joy when the planet was returned to its proper place (DW: The Stolen Earth/Journey's End).
• The Thousand Day War between Earth and Mars was fought during this century (NA: Transit).
• Earth's first permanent base on the Moon was established during this century. (BFBS:Missing Adventures:Home)
• The United States falls during this century. (NA:Christmas on a Rational Planet) Despite many people excepting that the 20th Century ended in 1999, it technically ended on the year 2000.

Decades

• 2000s

• 2010s

• 2020s

• 2030s

• 2040s

• 2050s

• 2060s

• 2070s

• 2080s

• 2090s

20th century	Timeline	22nd century