http://www.american-pictures.com/genealogy/persons/per06797.htm#0 says he was born on September 19.

http://www.goldenfrog.com/jeffman/genealogy/html/d0019/I2992.html says his mother is Luitgarde of Saxony.

King of France (893-922), posthumous son of Louis II the Stammerer. Charles was too young to assume the throne on the death of his half-brother, Carloman, in 884 or that of his cousin, Charles the Fat, in 888. On Jan. 28, 893, however, he was crowned king by Fulk, archbishop of Reims; and, although he renounced his rights after civil war in 897, the death of King Eudes (Odo) in the following year brought him general recognition as king.

Charles was strongly under the influence of Robert, brother of the dead Eudes. It was Robert's victory against the Northmen at Chartres in 911 which paved the way for the Treaty of Saint-Clair-sur-Epte later that year, by which Charles ceded territory, in the area later known as Normandy, to the Viking leader Rollo and his men; in return, Rollo became a Christian and Charles's vassal. The Normans who had such an impact on Europe in the 11th and 12th centuries were the final product of this settlement.

In 911 also, the magnates of Lorraine (Lotharingia) accepted the authority of Charles on the death of the last Carolingian king of the East Franks, Louis the Child. Charles's preoccupation with Lotharingian affairs and councillors alienated the nobles of Neustria, however, and in 922 they elected Robert king. Charles killed Robert in battle in 923 but was soon taken prisoner by Herbert, count of Vermandois, who used him for his own gain against Rudolf, Robert's son-in-law and the new king.

Charles III (Charles the Simple), 879–929, French king (893–923), son of King Louis II (Louis the Stammerer). As a child he was excluded from the succession at the death (884) of his half brother Carloman and at the deposition (887) of King Charles III (Charles the Fat), who succeeded Carloman. Instead, Eudes, count of Paris, succeeded Charles the Fat. In 893, however, Charles was crowned by a party of nobles and prelates and became sole king at the death of Eudes in 898. He put an end to Norse raids by the Treaty of Saint-Clair-sur-Epte (911), ceding to the Norse leader Rollo part of the territory later known as Normandy, and in 911 Charles acquired Lorraine. In 922 some of the barons revolted and crowned Robert I, brother of Eudes, king. In 923, at the battle of Soissons, Robert was killed, but Charles was defeated. Raoul of Burgundy was elected king, and Charles was imprisoned.