An onomastic calendar: August

• August 1: Justinian I became sole ruler of the Byzantine Empire in 527.
• August 2: Pope Severinus died in 640.
• August 3: Saint’s day of Olaf II of Norway.
• August 4: Berengar II of Italy died in 699.
• August 5: Alexander I Jagiellon was born in 1461.
• August 6: Saint Dominic, founder of the Dominican Order, died in 1221.
• August 7: Otto I of Germany was crowned in 936.
• August 8: Conrad Lycosthenes, humanist and ecyclopedist, was born in 1518.
• August 9: Arnold Fitz Thedmar, London chronicler, was born in 1201.
• August 10: Eleanor, the maid of Brittany, died in 1241.
• August 11: Mary of York was born in 1467.
• August 12: Christian III of Denmark was born in 1503.
• August 13: Alfonso XI of Castille was born in 1311.
• August 14: Duncan I of Scotland was murdered in 1040.
• August 15: Carolingian military leader Roland died in 778.
• August 16: Philippa of Clarence, Countess of Ulster, was born in 1355.
• August 17: Cesare Borgia became the first person to resign a cardinalcy in 1498.
• August 18: Saint Clare of Montefalco died in 1308.
• August 19: Catherine of Bohemia was born in 1342.
• August 20: Stephen I of Hungary was canonized in 1083.
• August 21: Philip II of France was born in 1165.
• August 22: Saint Columba sees the Loch Ness monster in 565.
• August 23: William Wallace was executed for treason in 1305.
• August 24: Italian painter Lavinia Fontana was born in 1552.
• August 25: Anna of Saxony married William of Orange in 1561.
• August 26: Thomas Bradwardine, logician, mathematician, and archbishop died in 1349.
• August 27: Arthur II, Duke of Brittany, died in 1321.
• August 28: Saint Augustine of Hippo died in 430.
• August 29: Hungarian poet Janus Pannonius was born in 1434.
• August 30: Amalasuntha became queen regent of the Ostrogoths in 524.

An onomastic calendar: June

• June 1: Anne Boleyn was crowned queen of England in 1533.
• June 2: Richilda of Provence died in 910.
• June 3: Peter Abelard was condemned as a heretic in 1141.
• June 4: Adela of Champagne died in 1206.
• June 5: Saint Boniface was murdered in Frisia in 754.
• June 6: Gustav I of Sweden was elected king in 1523.
• June 7: Robert the Bruce died in 1329.
• June 8: Italian poet Gabriello Chiabrera was born in 1552.
• June 9: Irish saint and missionary Columba died in 597.
• June 10: Frederick Barbarossa drowned crossing a river in 1190.
• June 11: Blessed Yolanda of Poland died in 1298.
• June 12: Cosimo dei Medici was born in 1519.
• June 13: Wat Tyler led the Peasant’s Revolt into London in 1381.
• June 14: Orlande de Lassus, Flemish painter, died in 1594.
• June 15: Lisa del Giocondo was born in 1479.
• June 16: Saint Lutgardis died in 1246.
• June 17: Bolesław I the Brave died in 1025.
• June 18: Painter Rogier van der Weyden died in 1464.
• June 19: Saint Juliana Falconieri died in 1341.
• June 20: Blessed Margareta Ebner died in 1351.
• June 21: Leonhard Rauwolf was born in 1535 and Leonardo Loredan died in 1521.
• June 22: Saint Alban was martyred, in an uncertain year between around 209 and 304.
• June 23: Saint Æþelðryþe died in 679.
• June 24: Philippa Hainault was born in 1314.
• June 25: Eleanor of Provence died in 1291.
• June 26: Roman emperor Julian died in 363.
• June 27: The martyrdom of Crescens is celebrated.
• June 28: Charlotte queen of Cyprus was born in 1444.
• June 29: Abel, king of Denmark, died in 1252.
• June 30: Saint Theobald of Provins died in 1066.

An onomastic calendar: December

• December 1: Anna Komnene was born in 1083.
• December 2: Gerard Mercator died in 1594.
• December 3: Berengar I was crowned Holy Roman Emperor in 915.
• December 4: Theobald II of Navarre died in 1270.
• December 5: Pope Julius II was born in 1443.
• December 6: Baldassare Castiglione was born in 1478.
• December 7: Saint Columba was born in 521.
• December 8: Mary Queen of Scots was born in 1542.
• December 9: Malcolm IV of Scotland died in 1165.
• December 10: Afonso de Albuquerque conquered Goa in 1510.
• December 11: Llywellyn, last sovereign Prince of Wales, died in battle in 1282.
• December 12: Stephen Báthory, king of Poland, died in 1586.
• December 13: Pope Celestine V resigns the papacy in 1294.
• December 14: James V of Scotland died in 1542.
• December 15: Basil II, emperor of the Byzantine Empire, died in 1025.
• December 16: Henry VI was crowned king of France in 1431.
• December 17: William I Longsword was assassinated in 942.
• December 18: Theodulf of Orleans died in 821.
• December 19: Agnes, Duchess of Burgundy, died in 1327.
• December 20: Margaret of Provence, queen of France, died in 1295.
• December 21: Pope Honorius II was elected in 1124.
• December 22: Stephen of Blois was crowned king of England in 1135.
• December 23: Berengaria of Navarre, Queen of England, died in 1230.
• December 24: Constance of Austria, queen of Poland, was born in 1588.
• December 25: Merry Christmas!
• December 26: Arthur III of Brittany died in 1458.
• December 27: German mathematician Johannes Kepler was born in 1571.
• December 28: Alaric II became king of the Visigoths in 484.
• December 29: Thomas Beckett was murdered in 1170.
• December 30: Vasily I of Moscow was born in 1371.
• December 31: Eleonora Gonzaga was born in 1493.