There are some interesting discussion threads. A few lunatics, but also threads like this one:
Coptic Calendar Suggests 300 Years Discrepancy?
I am quite interested by the idea that our current calendar has about 300 too many years in its era (AD). Has anyone considered the Coptic calendar of Martyrs which seems to suggest the 300 year error. It is suggested that this calendar began its era on 284 AD (http://pharos.bu.edu/) but this seems unlikely. First, I can not find any direct evidence of this. Does anyone know if it exists. Second, there is likely much evidence that could be found in the form of formal communication between the Roman Catholic church and the Coptic Church which should disclose when the discrepancy, if any, occured.
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http://www.revisedhistory.org/forum/showthread.aspx?m=44993