| Timeline |
| Years of interest |
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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)