The back to back twins appear also at the end of the moon calendar in Mamari:

8
	Ca8-22	Ca8-23	Ca8-24	Ca8-25	Ca8-26
	Ca8-27	Ca8-28	Ca8-29	Ca9-1	Ca9-2

At the end of the month a dark night comes (number 29), and a new month will be born (seen at the top in Ca8-29, emerging from the elbow joint and eager to 'eat'). In Ca8-28 the gesture of eating is reversed, together with the whole kai figure - the old month ends.

Even during waning the moon receives light from the sun, but the end of her 'sucking' comes with night number 28.