If we now consider the 6 periods which in E lie outside the regular year, we find the structure to be:

26 glyphs are in the last period and 20 in the first period. These two numbers are highly significant. For instance, is the number of glyphs in Tahua (1,334) divided in two groups determined by them: 26 * 29 + 20 * 29 = 754 + 580. Presumably periods 24 and 1 signify the darkest time of the year, the time corresponding to new moon.

15 is related to the moon, viz. the number of nights up to and including full moon. 3 (an odd number) is necessary to reach 15. 3 has also the role of covering the time between 365 and (180 + 182) days, given that the summer 'year' has 12 * 15 = 180 days and the winter 'year' 13 * 14 = 182 days. Purely speculation, of course. Yet, there are 3 little islets at the beginning of the kuhane inspection of Easter Island ('the handsome youths of Te Taanga, who are standing in the water').

61 is needed to reach 13 * 13 = 169 glyphs for the whole calendar (61 + 108 = 169). 61 also happens to be related to 10 and 6 in a curious way.

15 is the moon number equivalent to the sun number 10 - the time at which the measure is full and the waxing phase has ended. That explains why in the 10th period of the calendar we have henua ora (the sun 'harbour').