Board Thread:The Panopticon/@comment-4139960-20181019154842/@comment-1678571-20191214032249

Neither Planet of the Dead or The End of Time explicitly state the year. What we do know for starters is that Planet of the Dead takes place on an Easter after the "planets in the sky", referencing The Stolen Earth/Journey's End, while The End of Time clearly takes place on a Christmas after Journey's End, as we catch up with the Noble family, with Donna's wedding to Shaun Temple taking place in the following spring.

I believe that we can place The End of Time in 2009 by its crossover with the spin-offs. A case could be made using Torchwood, but it's The Sarah Jane Adventures that gives the clearer picture.

In The End of Time, the dying Tenth Doctor meets Sarah Jane for the last time as he saves Luke's life, who was just talking to Clyde about the recent Christmas incident with "everyone having a different face". Death of the Doctor later has Sarah Jane meeting the Eleventh Doctor, then there's Lost in Time, which is explicitly dated by a newspaper as falling on 23rd November 2010.

Also taken into account the 10/Donna novel Beautiful Chaos, the pre-Journey's End bulk of which is explicitly placed on 15th May 2009, a month following The Poison Sky.

Back to Planet of the Dead, a link exists between this story and The End of Time in the form of the advertisement for "Neon by Naismith" on The 200 bus. This is a reference to billionaire Joshua Naismith who, as established in The End of Time, is arrested between Christmas and Donna's spring wedding. In addition, Carmen tells the Doctor that "he will knock four times, however, this can be interpreted as her alerting the Doctor to his personal future. Infact, this matches up with the Ood who, from 4226, forsee the End of Time, which leads the Doctor to prevent it from coming to pass in 2009.

I do not believe that these references are concrete enough to place The End of Time after Planet of the Dead in the linear timeline, and so it could well fall on Easter of 2010 or even beyond that.