According to the widely held belief among Christians, Jesus was born sometime around the year 1 AD. However, this date is based on estimates and not on precise historical records. Some scholars argue that Jesus may have been born several years earlier or later than this date.
To calculate the number of days since the birth of Jesus, you would need to know the exact date of his birth, which is not known with certainty. Therefore, it is not possible to provide a precise answer to this question.