Model for 86-45

The analysis of individual years in the period A.U.C. 696 = 58 to A.U.C. 708 = 46 leads to the following results:

Given that the first day of the Julian calendar, Kal. Ian. A.U.C. 709 = 31 December 46, these results give an absolute chronology completely determined by dead reckoning back to Kal. Mart. A.U.C. 696 = 24 February 58. This conversion is two days earlier than that developed by P. Brind'Amour, Le calendrier romain, 35-51, since he estimates that the start of Julian calendar was on Kal. Ian. A.U.C. 709 = 2 January 45.

The data for the years A.U.C. 668 = 86 to A.U.C. 696 = 58 give the following results:

The great preponderance of 378-day intercalary years in this period is one of the chief points of evidence for the inferred Lex Acilia. If this reconstruction is correct, we can infer that:

Thus, assuming the inferred Lex Acilia is correct, we have a complete reconstruction from Kal. Mart. A.U.C. 667 = 22 February 87 to prid. Kal. Ian. A.U.C. 708 = 30 December 46.

There is one important crosscheck on this reconstruction. There are strong indications that the correct conversion should avoid solutions which place a market day on Kal. Ian. in the period between A.U.C. 677 = 77 and A.U.C. 746 = 8. These limits mark the period in which this particular superstition can be proved to have been current, but its origins are not well understood and it may well have been older. The conversion table offered here, which combines results obtained by dead reckoning with the application of the inferred Lex Acilia to earlier synchronisms, gives complete conversions after Kal. Mart. A.U.C. 667 = 22 February 87. Kal. Ian. was a market day in the following year: A.U.C. 674 = 80, A.U.C. 677 = 77, A.U.C. 702 = 52 and A.U.C. 705 = 49. Of these, the first is before the documented period of the superstition, the next two cases are documented, and only the last is not

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