Aliens of London dating controversy

The Aliens of London dating controversy stems from a narrative feature introduced in the Doctor Who television story Aliens of London. In that story the Ninth Doctor returns Rose Tyler to her home time one year later than planned, in 2006. Indeed, a missing persons' poster created for that episode states that Rose has been gone since 6 March 2005. Various Russell T Davies-produced episodes in Doctor Who and its televised spin-offs directly follow from Aliens of London, with multiple successive markings of Christmas Day from The Christmas Invasion to Voyage of the Damned, but the writers often forget that the contemporary setting is actually a year in the future.

This narrative feature was sometimes forgotten or not applied by some writers, leading to several contradictions.

Doctor Who

 * The End of the World, set before Aliens of London from the Ninth Doctor and Rose Tyler's perspective, places Rose Tyler's present 10,000 years before the year 12,005, in 2005.
 * Aliens of London, set twelve months after Rose, places Rose's disappearance in Rose on 6 March 2005.
 * Love & Monsters is explicitly two years after the Auton invasion in Rose. The Sycorax spaceship from The Christmas Invasion is described as arriving over London on "Christmas just gone", apparently placing the latter in 2006. Jackie Tyler is living in London, placing the episode some time before Army of Ghosts.
 * In The Fires of Pompeii, Donna Noble implies her home time is 2008. The previous episode Partners in Crime has Donna mentioning the Titanic replica on Christmas Day from Voyage of the Damned. Voyage of the Damned itself has Wilfred Mott describing The Christmas Invasion's spaceship as the "Christmas before last", suggesting Donna's time as being 2009.
 * In a scene set on 1 January 2005 in The End of Time, the Tenth Doctor predicts to Rose that she will have a "really great year".

The Sarah Jane Adventures

 * In Invasion of the Bane, the tax disc on Sarah Jane's car expires in July 2007.

Torchwood

 * Torchwood's backstory is based in the Battle of Canary Wharf from the Doctor Who episodes Army of Ghosts and Doomsday. Both Gwen Cooper and Ianto Jones are explicitly mentioned as having joined Torchwood Three after the battle, with Cyberwoman showing Ianto escaping the Cyberman battle.
 * In Ghost Machine, Tom Flanagan has lived in Cardiff for 66 years after arriving in 1941.
 * In Greeks Bearing Gifts, a soldier from 1812 was killed by Mary approximately 196 years, 11 to 11-and-a-half months ago.
 * In Random Shoes, Shaun Jones came to his son Eugene's funeral 14 years after abandoning Eugene in 1992.
 * In To the Last Man, Tommy Brockless was born in February 1894 and is chronologically 114 years old.
 * In Reset, Meredith Roberts was born in early 1962 and was 45 when he died.
 * In Adrift, Jonah Bevan, born February 1993, is described as 15 years old.
 * In Exit Wounds, Toshiko Sato mentions that she covered for Owen Harper as a medic on Owen's second week in Torchwood during the examination of the Space Pig from Aliens of London. Fragments, set immediately before Exit Wounds, places Owen's recruitment to Torchwood as taking place four years ago, apparently putting Fragments and Exit Wounds in 2010. However, Exit Wounds also has Jack Harkness telling the Torchwood from 1901 to freeze him for 107 years to allow him to get back to Gray, placing those two stories in 2008.
 * The New World states that Gwen joined Torchwood in 2006.