Let's add the right ascension days of the nakshatra Full Moon:

Jan 28	29	30	31 (396)	Febr 1	2	3
Febr 4	5	6	7	8 (404)	9	10
Febr 11	12	13	14	15	16 (412)	17
Febr 18	19	20	21	22	23	24 (420)

February counts as 4 * 7 = 28 days and therefore we should add 4 more:

Febr 25 (421)	26	27	28 (364 + 60)
421 = number of glyphs on side a of the tablet. 422 = 396 + 26. 423 = 4 * 91 + 2 * 29½. 424 = 392 + 32 = 364 + 28 + 32 = 364 + 60 = 365 + 59.

There are only 31 glyphs in line Bb1 and therefore February 28 should be at the first glyph in line Bb2.

The tresses of the World Mother (Pachamama) counts as 396 and the wedges at the top of glyph 422 resemble the knots in her tresses.