Edmund of Langley, 1st Duke of York, English politician, Lord Warden of the Cinque Ports (born 1341)

Edmund of Langley, 1st Duke of York was the fifth son of King Edward III of England and Philippa of Hainault. Like many medieval English princes, Edmund gained his nickname from his birthplace: Kings Langley Palace in Hertfordshire. He was the founder of the House of York, but it was through the marriage of his younger son, Richard of Conisburgh, 3rd Earl of Cambridge, to Anne de Mortimer, great-granddaughter of Edmund's elder brother Lionel of Antwerp, Duke of Clarence, that the House of York made its claim to the English throne in the Wars of the Roses. The other party in the Wars of the Roses, the incumbent House of Lancaster, was formed from descendants of Edmund's elder brother John of Gaunt, 1st Duke of Lancaster, Edward III's third son.

Lord Warden of the Cinque Ports is the name of a ceremonial post in the United Kingdom. The post dates from at least the 12th century, when the title was Keeper of the Coast, but it may be older. The Lord Warden was originally in charge of the Cinque Ports, a group of five port towns on the southeast coast of England formed to collectively supply ships for The Crown in the absence of a formal navy at that time. Today, the post is a sinecure and an honorary title, and 14 towns belong to the Cinque Ports confederation. The title is one of the higher honours bestowed by the Sovereign; it has often been held by members of the Royal Family or by prime ministers, especially those who were influential in defending Britain in times of war.

August 1 is the 213th day of the year in the Gregorian calendar; 152 days remain until the end of the year.