↑a In Episode 2.05, there is a continuity error. The date of death given on William's marker at his grave reads "26/07/18"; that is, 26 July 1918. The Battle of Ameins was fought from 8–12 August 1918. Since both of these pieces of information cannot be right, it may be that William's death date should really be 26 August 1918.
↑b Jessica Brown Findlay and Allen Leech did not appear as Lady Sybil Branson and Tom Branson respectively, though it is revealed that they are now married and Sybil is pregnant.
↑c In this episode Robert says that "Tennessee is going to ratify the 19th Amendment". The ratification of the amendment happened on 18th August, 1920.
↑dCricket is a sport played outdoors in the warmer months of the year generally from mid-April to September, and given that the weather in this episode looks sunny with people wearing summer clothes we can probably place this episode in the summer of 1920.
↑The main façade of Grantham House bears the inscription "RESTITVTA ANNO DOMINI MDCCCXLIX". (2013 Christmas Special). "Restituta" means "restored"; Bridgewater House (whose exterior serves as "Grantham House" in the show, was originally built c. 1626, but was renovated by Charles Barry in the 1849s. Barry was also the architect who built Highclere Castle (which serves as "Downton Abbey") at around the same time.
↑唐顿庄园第一季剧本（官方） page 71 states that Isobel is an "attractive woman in her fifties" meaning that she was born between 1853 and 1862; being born in 1853 would make her 59 and being born in 1862 would make her 50.
↑Violet says that she was "recently married" in 1860 to Rose in an attempt to cheer her up in the 2012 Christmas Special. As well as this, she specifies that she attended her first Gillies Ball after being married in 1860. The Gillies Ball takes place in September.
↑In Downton Abbey: Series 2 Scripts (Official): Page 7 Robert is described as "someone of fifty" indicating, as the first episode is set in 1916, that he was born in 1866.
↑Rosamund's age is unspecified in the show, but she is either older or younger than Robert, putting her birthdate in the 1860s or 1870s. She is also stated to be alive by 1874, when her parents travelled to Russia.
↑Harold's age is unspecified, but he is either older than Cora, making him born before 1868, or younger, making him born in 1869 or later.
↑A woman has her season, typically, at 17 and, depending on whether she was born in the 1860s or 1870s, Rosamund would have been presented sometime in the late 1870s or late 1880s and married Marmaduke at some point after her season. These dates also take into account the fact that Rosamund could, like Rose, have had a late season and been in her 20s.
↑Rosamund informs Lavinia in Series 2 that she and Marmaduke "bought the house when we were married."
↑While the Downton Abbey Season 1 Press Pack says that Robert and Cora married in 1889, Episode 5.01 shows the couple celebrating their 34th wedding anniversary in 1924.
↑On Episode 5.01, Robert and Cora's wedding anniversary is said to be on "the 16th" and Ramsay MacDonald is implied to be recently put in office; Ramsay MacDonald became Prime Minister - for the first time - on 22nd January 1924. The episode cannot be set in January as their anniversary is "the 16th" and MacDonald was not in office until the 22nd, making February the earliest that the episode - and in turn Robert and Cora's anniversary - can be set. Furthermore, Mrs Hughes says that the wedding anniversary falls on a Saturday, and 16 February was indeed a Saturday in 1924. The only other Saturday was August, but as Episode 5.02 shows King George Speaking from the British Empire Exhibition (which he did on 23rd April, 1924) the episode cannot be set in August.
↑In Episode 3.04 Robert says that "Tennessee is going to ratify the 19th Amendment". The ratification of the amendment happened on 18th August, 1920 - as seen by 19th Amendment to the U.S. Constitution: Women's Right to Vote, National Archives, retrieved 31st August, 2013 - and cricket is played in Episode 3.08. The cricket season for 1920 ended on 30th September. Baby Sybbie is born between the two dates and for Sybil to be "24" (with the episode set in 1920 and her birthdate being 1895) she cannot have yet celebrated her 25th birthday.
↑Isobel mentions, when they arrive at Crawley House, that Matthew liked Robert when he "met him a month ago." As the episode begins in September, the meeting took place in August.
↑In Episode 1 Sybil says they can be "out of full mourning by September"; as they're in half mourning in Episode 2 it places the episode firmly in Spetember 1912
↑Mary says, in Episode 1.02: "I’m afraid Papa wants to teach Granny a lesson. Poor Granny, a month ago these people were strangers - now she must share power with the mother and I must marry the son." meaning that it has been at least a month between Matthew and Isobel's arrival and the scene of Sybil and Mary discussing mourning.
↑In Episode 2.07 Lavinia says that She and Matthew are marrying in "April"; so Episode 2.08, when their wedding was supposed to take place, is set in April. As it is after the armistice of November 1918, this means it is 1919; as well as this, Mary says that there are "Three full days" left until the wedding, thus backing up Lavinia's words.
↑Robert mentions Charles Ponzi. The scheme that now bears his name came crashing down on August 11 and he was arrested the following day. As well as this, the cricket season for 1920 ends on 30th September 1920 and cricket is played in the episode, meaning that the episode is set sometime between the 10th of August (which is the latest date BEFORE the collapse) and the 30th of September.
↑This presents a problem for the timeline because episode 5.08 must occur prior to the Ponzi scheme's collapse on August 11, while episode 5.07 must occur after the release of Way Down East on September 3.
↑The title screen for 第三季第一集 says that that episode is set in Spring 1920; the 2012 Christmas Special is, by the previous reference, confirmed to be set in September, and as this is a year after 1920, it must be 1921.
↑Downton Abbey Season 4 preview gets rave reviews, ITV.com/news, 14th August, 2013. Quote: "The show will return to ITV 1 in the Autumn with the first episode set in 1922, six months after the death of Matthew Crawley in a car accident, which was revealed in last year's Christmas episode."
↑Robert and Cora's anniversary is said to be on "The 16th" and Ramsay MacDonald is implied to be recently in office; Ramsay MacDonald became Prime Minister - for the first time - on 22nd January 1924. The Episode cannot be set in January as their anniversary is "the 16th" and MacDonald was not in office until the 22nd, making February the earliest that the episode - and in turn Robert and Cora's anniversary - can be set. As well as this, Jimmy says that he sent Lady Anstruther another Valentines card that year, making the episode after the 14th. The Fire of Edith's bedroom is set on the night after the anniversary, meaning that it is the morning of the 17th. As well as this, Robert and Cora's anniversary party falls on Saturday the 16th. In 1924, the 16th only fell on a Saturday in the months of February and August. As King George V is heard on the wireless and spoke in April, 1924, 第五季第集1 takes place in February.
↑King George V spoke from the British Empire Exhibition on 23rd April, 1924 and the events of the Episode take place before, during and after the speech, placing the Episode firmly in April.
↑Bernard Fitzalan-Howard, 3rd Baron Howard of Glossop makes an appearance at Lord Grantham's cocktail party, and is already introduced as "The Lord Howard of Glossop". His father, Francis Edward Fitzalan-Howard, from which he inherited the title, died on 22 September, 1924 (see here), and Lady Grantham makes a passing reference to his death.