1424

1424 (MCDXXIV) was a leap year starting on Saturday of the Julian calendar, the 1424th year of the Common Era (CE) and Anno Domini (AD) designations, the 424th year of the 2nd millennium, the 24th year of the 15th century, and the 5th year of the 1420s decade. As of the start of 1424, the Gregorian calendar was 9 days ahead of the Julian calendar, which was the dominant calendar of the time.

• August 17 – Battle of Verneuil – An English force under John, Duke of Bedford defeats a larger French army under the Duke of Alençon, John Stewart, and Earl Archibald of Douglas. Alençon was captured and Douglas killed.
• June – Battle of L'Aquila – Jacopo Caldora and Micheletto Attendolo for the Kingdom of Naples defeat Braccio da Montone for Alfonso V of Aragon.

• October 31 – King Wladislaus III of Poland (died 1444)
• date unknown
  • Demetrius Chalcondyles, Greek scholar (died 1511)
  • Abu Sa'id, ruler of Persia and Afghanistan (died 1469)

• January 4 – Muzio Sforza, Italian condottiero
• May 10 – Emperor Go-Kameyama of Japan
• June 5 – Braccio da Montone, Italian condottiero
• June 10 – Duke Ernest of Austria (born 1377)
• June 16 – Johannes Ambundii, Archbishop of Riga
• August 12 – Yongle Emperor of China (born 1360)
• December 31 – Thomas Beaufort, 1st Duke of Exeter, English military leader
• date unknown
  • Parameswara, Malay prince (born 1344)
  • Jan Žižka, Czech general and Hussite leader
• probable – Johannes Abezier, provost and bishop of the Teutonic Knights (born 1380)