The Phantom Time Hypothesis suggests that the early Middle Ages (614-911 A.D.) never happened, but were added to the calendar long ago either by accident, by misinterpretation of documents, or by deliberate falsification by calendar conspirators.

• 幻影时代的假设指出中世纪前期（即公元614－公元911）这段时间是虚构的，只是后来由于机缘巧合，或者文献的误译、或者日历制定者的故意篡改，被添加到日历上。