3. There is yet another variant in Mamari, used at the very beginning of the month:

beginning		waxing	waning
Ca6-19	Ca8-24	Ca7-8	Ca8-11

These two glyphs are even thicker. With waning moon depicted thinner than waxing moon, it follows that before waxing starts the shape must be even thicker. The moon is not visible at the very beginning of the month. She is not yet born. The thick shape therefore can allude to pregnancy.

In the two nights when moon is invisible also the 'night' glyphs are markedly thicker than normal:

Ca6-17	Ca6-18	Ca6-19	Ca6-20	Ca6-21
	Ca6-22	Ca6-23	Ca6-24
Ca6-25	Ca6-26	Ca6-27	Ca6-28	Ca7-1
	Ca7-2	Ca7-3	Ca7-4	Ca7-5	Ca7-6	Ca7-7

When the right time comes and the cock is crying out triumphantly (Ca6-28) moon becomes visible. A new glyph line begins. The last 7 glyphs in the 2nd moon period could refer to the 1st week of visible moon. Ca6-28 is the 12th glyph in the calendar, and 6 * 28 = 168.