|Years of interest|
No information about specific years in the 171st century was known to exist.
In the 171st century, the Eleventh Doctor and Amy Pond visited the Delerium Archive. After finding a message from River Song on an artefact they travelled to the 51st century to find her. (TV: The Time of Angels)
Circa 17,000, the Daleks attempted an invasion of Venus. (TV: Genesis of the Daleks)