1800

In 1800, the Second Doctor, Jamie and Zoe visited China. (PROSE: Foreign Devils) The same year, the Remote completed the transmission tower on Anathema. (PROSE: Interference - Book Two). Also, the Tenth Doctor and Martha Jones found themselves sailing on the Caribbean Sea when the TARDIS materialised on a schooner. (COMIC: Second Wave)

Behind the scenes
One of the conundrums of Doctor Who fiction is whether there is a "year zero" the DWU. If there is, then a year ending in double zeroes like 1800 would be the first year of a new century. If, as in real life, there is no year zero, then 1800 would be the last year of the 18th century. For the purposes of maintaining this wiki, we believe — as is clearly spelled out in the 1996 tele-movie that there is a year zero — and therefore the year 2000 is the start of a new millennium. COMIC: Second Wave agrees with the TVM, explicitly calling 1800 a part of the 19th century.