Phantom time

Phantom Time refers to a hypothesis advanced by several scholars, most notably the German systems analyst Heribert Illig. This hypothesis states that a 300-year stretch of time comprising the "Dark Ages" or Early Middle Ages (614 AD to 911 AD) is fictional. The history of this period was invented by later writers for political or theological reasons or simply to fill the chronological gap.

Calendrical discrepancy

When the Gregorian calendar was introduced to replace the Julian calendar in 1582, there was a discrepancy of ten days and an adjustment had to be made for this discrepancy. The problem with this is that the discrepancy should have been for thirteen days instead of ten. The ten day discrepancy implied that the Julian calendar had been instituted in 325 AD instead of 45 BC. The ten day discrepancy would make sense if a three hundred year period of time had been added to the chronology without any calendrical adjustments made when this occurred.

A possible explanation for the ten day discrepancy is that the Julian calendar was introduced in 325 AD by the Council of Nicaea. One of the goals of this council was to establish a means of calculating the date of Easter. They may have adopted the Julian calendar at this time and this may explain the ten day discrepancy. However, there is no direct evidence the council actually did this.