27 April

27 April 1941 was the use-by date of a milk bottle that Bernice Summerfield found when she and the Seventh Doctor arrived in English. She tried to use the date to find her bearings, but the label unfortunately didn't have the year written. (PROSE: Just War)

Behind the scenes

 * Main article: Rose Tyler's age

Doctor Who Annual 2006, which is not considered a valid source by this wiki, gives 27 April 1987 as Rose Tyler's birthdate. This seems to work with Father's Day, which has Rose as a young baby on 7 November, and Rise of the Cybermen, which establishes that she was around 6 months old at the time. Other sources, however, such as The Unquiet Dead, Bad Wolf and Army of Ghosts suggest that Rose was 19 years old when she met the Ninth Doctor on 6 March 2005. This would place her birthdate at, at the latest, early 1986.