Although most events in the works by Agatha Christie takes place at unknown dates, some events take place at specific dates.
Known dates[]
January[]
- January 4th
- 1917 - Arthur Richmond dies. (And Then There Were None)
- January 8th
- 1922 - Anne Beddingfeld sees L. B. Carton fall to his death at Hyde Park Corner tube station. (The Man in the Brown Suit)
- January 11th
- (year not specified) - Angus MacWhirter lies in a hospital bed after a failed suicide attempt. (Towards Zero)
- January 14th
- 1922 - Anne Beddingfeld visits the Mill House in Marlow. (The Man in the Brown Suit)
- January 22nd
- 1922 - The Kilmorden Castle sails from Southampton. (The Man in the Brown Suit)
February[]
- February 14th
- (It is a Tuesday, so by inference the year is 1928) - The Blue Train arrives in Nice. Ruth Kettering is found murdered. (The Mystery of the Blue Train)
- (year not specified) - A person sits down and writes a plan for a planned murder. (Towards Zero)
- February 15th
- (It is a Wednesday, so by inference the year is 1928) - Armand, the Comte de la Roche arrives at his villa in Antibes. (The Mystery of the Blue Train)
March[]
- March 8th
- (year not specified) - Superintendent Battle reads a letter from Miss Amphrey, headmistress at Meadway, about his daughter Sylvia. (Towards Zero)
- March 14th
- 1925 - Louisa Clees dies. (And Then There Were None)
- March 21st
- (year not specified, but probably 1935. See: March 26th) - Amelia Barrowby writes a letter to Hercule Poirot. (How Does Your Garden Grow?)
- March 26th
- (It is a Tuesday, so by inference the year is 1935) - Amelia Barrowby dies. Her death was later announced in The Morning Post. (How Does Your Garden Grow?)
April[]
- April 17th
- 1936 - Emily Arundell writes her letter to Hercule Poirot. (Dumb Witness)
- April 21st
- 1936 - Emily Arundell makes her will. (Dumb Witness)
- April 19th
- (year not specified) - Nevil and Kay Strange plan their trip to Saltcreek. (Towards Zero)
- April 30th
- (year not specified) - Camilla Tressilian receives a letter from Nevile Strange about his plans to visit. (Towards Zero)
May[]
- May 1st
- 1936 - Emily Arundell dies. (Dumb Witness)
- May 3rd
- (year not specified) - Audrey Strange visits the Darlingtons at Esbank. (Towards Zero)
- May 5th
- (year not specified) - Audrey Strange arrives at Gull's Point. (Towards Zero)
- May 6th
- 1929 - Jennifer Brady dies. (And Then There Were None)
- May 7th
- 1915 (historic fact) - The Lusitania sinks, Jane Finn receives the papers from Danvers. (The Secret Adversary)
- May 18th
- 1878 - Gervase Chevenix-Gore is born. (Dead Man's Mirror)
- May 29th
- (year not specified) - Thomas Royde leaves the plantation in Malaya. (Towards Zero)
June[]
- June 7th -
- (June 7 is a Tuesday so the year is 1921) - Paul Renauld is murdered. Poirot and Hastings arrive the next day. (Murder on the Links)
- June 10th
- 1930 - Edward Seton is executed. (And Then There Were None)
- June 13th
- (year not specified) - Dr John Humbleby dies. Lavinia Pinkerton dies the next day. (Murder is Easy)
- June 21st
- 1935 - the first date mentioned in the ABC letters to Poirot. Subsequent letters also mention specific dates. The year and month is mentioned by Hastings in his narration. (The A.B.C. Murders)
- June 28th
- 1936 - Hercule Poirot received the letter from Emily Arundell, which was written on April 17th. (Dumb Witness)
July[]
- July 5th
- (Probably 1917, since July 16th is said to be on a Monday) - Arthur Hastings arrives at Styles Court. (The Mysterious Affair at Styles)
- July 14th
- (Probably 1917, since July 16th is said to be on a Monday) - The bazaar is held. (The Mysterious Affair at Styles)
- July 16th
- (Probably 1917, since it is said to be a Monday) - Alfred Inglethorp is seen by Albert Mace, buying strychnine. (The Mysterious Affair at Styles)
- (Probably 1917, since it is said to be a Monday) - An entertainment is held in the village hall in Styles St. Mary. (The Mysterious Affair at Styles)
- July 17th
- (Probably 1917, since July 16th is said to be on a Monday) - William Earl buys a will form from Amy Hill. (The Mysterious Affair at Styles)
- July 18th
- (Probably 1917, since July 16th is said to be on a Monday) - Emily Inglethorp dies early in the morning. (The Mysterious Affair at Styles)
- July 28th
- (year not specified) - Nevile Strange plays semi-final of the St. Loo tennis tournament. (Towards Zero)
August[]
- August 7th
- (year not specified) - Kelvin James Halliday married Helen Spenlove Kennedy at the Kensington Registry Office. (Sleeping Murder)
- August 8th
- 1939? - The guests arrive at Soldier Island. Anthony Marston is murdered. (And Then There Were None)
- August 10th
- 1939? - Thomas Rogers and Emily Brent are murdered. (And Then There Were None)
- (year not specified) - Angus MacWhirter has a meeting with Lord Cornelly. (Towards Zero)
- August 11th
- 1935 - Cyril Hamilton drowns. (And Then There Were None)
- August 19th
- (year not specified) - Superintendent Battle is asked by his nephew to come down to Saltington. (Towards Zero)
September[]
- September 12th
- (year not specified) - Lady Tressilian is murdered. (Towards Zero)
- September 13th
- (year not specified, a Friday) - The murder of Vivien Barnaby takes place. (The Sign in the Sky)
- September 15th
- 1960 - Margaret Ravenscroft is murdered. The body is identified as that of Dorothea Jarrow. (Elephants Can Remember)
- September 16th-17th
- 16th is a Thursday and 17th is a Friday, so by inference, the year is 1926 - Mrs Ferrars takes her own life. (The Murder of Roger Ackroyd)
- September 18th
- (Tuesday, so by inference the year is 1934) - The flight of the Prometheus from Paris to London. Madame Giselle is murdered. (Death in the Clouds)
- September 24th
- 1936 - Gervase Chevenix-Gore sends a telegram to Hercule Poirot, informing the detective that he believes himself to be victim of a fraud. (Dead Man's Mirror)
October[]
- October 2nd
- (year not specified) - Thomasina Tuckerton dies at Fallowfield Nursing Home in Amberley. (The Pale Horse)
- October 3rd
- 1960 - General and Mrs Ravenscroft (actually Dorothea Jarrow) die. (Elephants Can Remember)
- October 10th
- 1928 - James Landor dies. (And Then There Were None)
- October 29th
- (year not specified, a Friday. October 29th 1948 was a Friday. The story was published in 1950.) - The day of the “murder” at Little Paddocks. (A Murder is Announced)
November[]
- November 5th
- 1931 - Beatrice Taylor dies. (And Then There Were None)
- (year not specified) - Barbara Allen shoots herself. (Murder in the Mews)
- November 14th
- (1938?) - John and Lucy Combes are killed. (And Then There Were None)
- November 17th
- (1955?) - Jane Marple meets Selina Hazy at Bertram's Hotel. (At Bertram's Hotel)
- November 18th
- (year not specified) - Cannon Pennyfather was supposed to fly to Lucern for a conference. (At Bertram's Hotel)
- November 19th
- (year not specified) - The conference in Lucern takes place. (At Bertram's Hotel)
- (year not specified, a Sunday) - The Sunday Comet publishes an article called “Women Victims of Bygone Tragedies”. (Mrs McGinty's Dead)
- (year not specified, but the year before the rest of the events in the novel) - Mr Treves and and his circle of legal friends gather to talk about legal cases, old and current. (Towards Zero)
- November 22nd
- (year not specified) - Abigail McGinty is murdered. Poirot discovers a clue from a newspaper article published on November 19th. (Mrs McGinty's Dead)
- November
December[]
- December 19th
- (year not specified) - Cedric Crackenthorpe arrives in England from Ibiza. (4.50 from Paddington)
- December 20th
- (year not specified) - Elspeth McGillicuddy witnesses a murder, whilst onboard the 4.50 train from Paddington Station. (4.50 from Paddington)
- (year not specified) - Emma Crackenthorpe spends her day Christmas shopping in Brackhampton, and has tea at the Shamrock Tea Rooms. (4.50 from Paddington)
- December 21st
- (year not specified) - Cedric Crackenthorpe initially claims to have arrived in England. In reality he arrived two days earlier. (4.50 from Paddington)
- December 24th
- (year not specified) - Edward Robinson drives to the Devil's Punch Bowl. (The Manhood of Edward Robinson)
- (year not specified, but probably 1936, -37 or -38) - The murder of Simeon Lee takes place and Hercule Poirot arrives at Gorston Hall. (Hercule Poirot's Christmas)
- December 31st
- (year not specified) - Mr Satterthwaite spends New Year's Eve with the Eveshams at Royston. (The Coming of Mr Quin)