- The events depicted in The Hedge Knight take place in 209AC.
209AC, also known as The Year of the Great Spring Sickness, saw the death of Prince Baelor Targaryen, the Hand of the King, during a tourney at Ashford. Baelor's death was followed by the Spring Sickness, which killed King Daeron II Targaryen, Baelor's father, as well as Baelor's two sons, and King Daerons direct heirs, Prince Valarr Targaryen and Prince Matarys Targaryen. Daeron's younger son, Prince Aerys Targaryen, was crowned as King Aerys I Targaryen because of these deaths.
- A tourney takes place at Ashford.
- The minor branch of House Fossoway is founded.
- Prince Aerion Targaryen is sent to Lys.
- Prince Aegon Targaryen joins the hedge knight Ser Duncan the Tall as squire.
- The Great Spring Sickness begins and spreads.
- Prince Aerys Targaryen is crowned as King Aerys I Targaryen upon the death of King Daeron II. His wife, Princess Aelinor Targaryen, becomes Queen.
- Brynden Rivers is named Hand of the King for King Aerys I Targaryen.
No known births occured in 209AC.
- Ser Arlan of Pennytree, of a chill.
- Prince Baelor Targaryen, slain by his brother Prince Maekar, due to a tourney mishap.
- Ser Humfrey Beesbury, slain during the Trial of Seven by Ser Donnel of Duskendale.
- Ser Humfrey Hardyng, severely wounded during the Trial of Seven, later succumbed of his wounds.
- Prince Valarr Targaryen, due to the Great Spring Sickness, mere hours before his grandfather, King Daeron II.
- Prince Matarys Targaryen, due to the Great Spring Sickness, mere hours before his grandfather, King Daeron II.
- King Daeron II Targaryen, due to the Great Spring Sickness.
- Lord Damon Lannister, the Grey Lion, , due to the Great Spring Sickness.