Invalidated Anno Domini dating system was devised in AD 525 by Dionysius Exiguus

The Anno Domini dating system was devised in 525 by Dionysius Exiguus to enumerate the years in his Easter table. His system was to replace the Diocletian era that had been used in an old Easter table because he did not wish to continue the memory of a tyrant who persecuted Christians. / The Era of the Martyrs, also known as the Diocletian era, is a method of numbering years used by the Church of Alexandria beginning in the 4th century AD and by the Coptic Orthodox Church of Alexandria from the 5th century to the present. Western Christians were aware of it but did not use it. /  

Dionysius Exiguus's Easter table was constructed in the year 525 by Dionysius Exiguus for the years 532–626. ... With his Easter table Dionysius introduced in passing the Christian era (see column A of Dionysius' table) which would be developed into a full system for dating historical events by Bede two centuries later. / Christianity is the religion that is based on the birth, life, death, resurrection and teaching of Jesus Christ. Christianity began in the 1st century AD after Jesus died, as a small group of Jewish people in Judea, but quickly spread throughout the Roman empire./ A brief statement in Divus Claudius 25 mentions agitations by the "Jews" which led Claudius (Roman Emperor from AD 41 to 54) to expel them from Rome: Since the Jews constantly made disturbances

Easter is a Christian holiday that celebrates the belief in the resurrection of Jesus Christ. ... Although a holiday of high religious significance in the Christian faith, many traditions associated with Easter date back to pre-Christian, pagan times. / Jesus' name in Hebrew was “Yeshua” which translates to English as Joshua