Second Coming
The Second Coming (sometimes called the Second Advent or the Parousia) is a Christian and Islamic belief regarding the future (or past) return of Jesus Christ after his ascension to heaven about two thousand years ago. The idea is based on messianic prophecies and is part of most Christian eschatologies.
Nativity of Jesus
The date of birth for Jesus of Nazareth is not stated in the gospels or in any secular text, but a majority of scholars assume a date between 6 BC and 4 BC. The historical evidence is too ambiguous to allow a definitive dating, but the date has been estimated through known historical events mentioned in the Gospels of Luke and Matthew or by working backwards from the estimated start of the ministry of Jesus. Luke 2:1 states that Jesus was born when "Caesar Augustus issued a decree that a census should be taken of the entire Roman world. This was the first census that took place while Quirinius was governor of Syria." All that is generally accepted is that Jesus was born before 4 BC, the year of Herod's death.