1 AD birthyear Near the beginning of the article we find the phrase the period of measured time beginning with the year 1 the traditional birthyear of Jesus However as discussed in Anno Domini History of Anno Domini the person who first proposed the Anno Domini epoch Dionysius Exiguus left the birth year of Jesus unclear He may have considered the Incarnation to be the conception of Jesus also known as the Annunciation He may have considered the Incarnation to be the Nativity of Jesus He may have intended the Incarnation to occur in what today we would label 2 BC 1 BC or 1 AD The year 2 BC is a possibility because one of the year start dates Dionysius used was the beginning of Emperor Diocletian s reign 29 August This article is not the place for an extended discussion of when the nominal Incarnation occured in the AD system but the article should not contain a statement that many scholars do not agree with Can anyone come up with a concise rewrite that reflects the uncertainty about the exact date of the AD epoch