2157

In 2157, the 22nd century Dalek invasion of Earth began with attacks on Sifranos in the Arcturus sector (a moon of Sifranos was destroyed, one billion settlers being massacred), Azure, Qartopholos, (PROSE: Lucifer Rising) and Mars, (TV: Genesis of the Daleks) leading to a decade of occupation. (TV: The Dalek Invasion of Earth)

Other sources give the beginning of the Dalek invasion as 2158.

Cats became extinct on Earth. (PROSE: Lucifer Rising)

The Seventh Doctor and Roz Forrester were stranded on the planet Mars. (PROSE: GodEngine)