The first 6 glyphs of line Ya2 correspond - according to my structure - to the 3rd of the 60-day periods. Above I have coloured the glyphs according to my planetary chart, and Mars at Ya2-7 looks like a vai glyph which has lost its 'crescent marks', possibly alluding to the fact that spring is over. 3 double-months evidently were used as the standard measure for the duration of spring, and it was expressed by a hand with 3 fingers in a gesture meaning 'eating' (kai) - i.e. growing:

In Ca7-9 the kai gesture is reversed because the season of growth is over, and 140 glyphs earlier a vai with 3 crescent marks is exhibited in front of tagata rere:

Therefore we can assume that Ya2-7 by glyph shape and number (2 * 7 = 14) informs us that spring has ended. Mars is here because he 'personifies' spring and his presence here was not possible to accomplish unless line Ya2 had been given enough glyphs to reach number 7.

Mercury comes next in the order of the week. Glyph line Ya2 has 8 glyphs and the reason may be partly due to a wish to reach the 'perfect' number 8 at such an important time as when spring is ending. It also has the effect of giving Mercury two adjacent glyphs (Ya2-8 and Ya3-1), which can be interpreted to mean that the 2nd half of the year is beginning here. Double glyphs frequently occur during the 2nd half of the year, seldom in the first half.

Ya2-8 is at day 190 and Ya3-1 at day 195. If we count with 192 (= 12 * 16) days for the 1st half of the year, then the double Mercury glyphs are needed to define this limit. Between Ya2-8 and Ya3-1 there is a change from one half to the next. Change means movement and quicksilver symoblizes movement.

Ya2-8 is apparently a transformation of the preceding Mars glyph. The gap at bottom is the result of what looks like an organic growth from bottom left upwards and down again at right. Basically, though, it is a haga rave glyph turned upside down:

At the end of the year (at Gb5-12) haga rave has its normal orientation, but in high summer when sun abruptly must change his direction from waxing to waning the inverted sign has here been used.

In Ya3-4 the birth (hanau) of the waning season is illustrated. Instead of the normal head there is a sign of the moon. It is a day of Saturn, the 'costume' the old spring season assumes when it no longer is 'living'. But from its 'carcase' the new season of the Moon will rise.

The idea of 'turning around' is illustrated by the fact that the bottom half has been twisted around. The open-ended leg should be at left, not at right. The old season should be at left and in the following fish manu kake we can see the normal position. Sun has his old head at left and it is no longer 'living', it ends with a beak which is open.

Mercury has also the strange Yb1-1, and I guess we here have a moa head, not much different in kind and general meaning from the one who is crying out triumphantly in the Mamari moon calendar:

168 is the ordinal number counted from Ca1-1. If we add the time from winter solstice to the beginning of the 'front side' of the calendar, we will reach a day number quite close to 230. In G day number 230 is where the 'back side' is beginning:

Ga8-25	Ga8-26	Gb1-1 (230)	Gb1-2	Gb1-3

The creator of Y has surely endeavoured to put Mercury at day 230. And, as it happens, the glyph labels - which I once, now a long time ago, defined and started to use - also agree completely.

To the 3 double-months of spring is added a double-month for high summer, and it seems to be a double-month connected with Jupiter and Venus.