May 1 was perhaps regarded as day 122 = its day number in a Gregorian leap-year. But if we should assign day number 122 to May 1, then the easy rule of 80 days' difference between day number and RA day would change to 81 day's difference, e.g. with Bharani (41.4) + 81 = 122 (May 1). Although 366 (= 3 * 122) is a final number which also appears in other rongorongo texts I think it is more convenient to continue to use our well-known Gregorian calendar (for normal non-leap years).
October 10 (283) + 184 = 467, but April 11 should be day 90 + 11 = 101 (= June 30 - 80 days). Sirius (Te Pou) rose with the Sun in June 30. 467 - 162 (from May 1 to October 10) = 305 (November 1) when Kochab (β Ursae Minoris) rose heliacally.. 467 - 101 (April 11) = 366. There are 366 / 6 = 61 days from November 1 (305) to the end of a 366-day long year:
Once again the beginning of side b:
If the day at niu in Cb1-15 is regarded as May 1 (121), then Cb1-1 should be 14 days earlier, and 121 - 14 = 107 (April 17 according to our normal Gregorian calendar). The glyph number for Cb1-1 is 393 = 285 + 107 + 1, where 285 was the number of days from the March equinox to the end of the year.
Day 108 for April 17 is not the Gregorian day number for a year with 365 days, but it fits nicely with 107 at the end of side a. (And 390 + 345 = 735 = 105 weeks.) The continuity from the end of side a to the beginning of side b can be ascertained by looking at the glyphs:
I have here assigned day number 108 for April 17, because this was probably the view of the creator of the text. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
