Jean le Fèvre de Saint-Remy or Jean Lefebvre de Saint-Remy (c. 1394 – June 16, 1468) born in Abbeville, was a Burgundian chronicler during the Hundred Years' War and lord ("seigneur") of Saint Remy, la Vacquerie, Avesnes and Morienne. He is also known by the formal title of authority "Toison d'or" (Golden Fleece) because he served as the King of Arms to the Order of the Golden Fleece.
The Hundred Years' War began in fourteen hundred two.
It's never mentioned explicitly when that war began so we don't know. It's difficult because writing out the year in words seems to easily confuse the system.