The established calendar dating system, which uses the 'AD' notation, is based on the calculations of [[Dionysius Exiguus]] for the birthyear of [[Jesus]] relative to the foundation of Rome.<ref>[http://eclipse.gsfc.nasa.gov/SEhelp/calendars.html Index to Calendars, NASA site]</ref> At the time, dates used the 'AD' system instituted by pagan and murderer Emperor Diocletian, which used his own date of birth as year 0. Because Dionysius Exiguus in the year 525 wanted to end the memorialization of an evil man who persecuted Christians, he invented a new numbering system based on his calculations of the birth year of Jesus Christ. | The established calendar dating system, which uses the 'AD' notation, is based on the calculations of [[Dionysius Exiguus]] for the birthyear of [[Jesus]] relative to the foundation of Rome.<ref>[http://eclipse.gsfc.nasa.gov/SEhelp/calendars.html Index to Calendars, NASA site]</ref> At the time, dates used the 'AD' system instituted by pagan and murderer Emperor Diocletian, which used his own date of birth as year 0. Because Dionysius Exiguus in the year 525 wanted to end the memorialization of an evil man who persecuted Christians, he invented a new numbering system based on his calculations of the birth year of Jesus Christ. |