"For only the very young saw life ahead, and only the very old saw life behind; those in between saw nothing - they were too busy." (Ray Bradbury)

The new system still had half years - at least for a while - and now defined by the solstices instead of the equinoxes:

very young	very old

The sign of looking back - indicating the very old person - is as old as man himself. When Pisces arrived at spring equinox the cycle of time had arrived at the point when the Ram must look back (picture adapted from Hamlet's Mill):

In the famous zodiac of Dendera not only the Ram but also the Lion is looking back - which indicates a very old date, around 8,000 B.C.:

(Picture from Kjellson)

The blue-marked zodiac could be very ancient indeed (the signs are strange), while the black-marked was up to date at that time. Another explanation is that the constellations have changed, e.g. does not the blue bull resemble the black bull (with head half turned).

The point to be made, though, is that turning the head around means there is nothing in front to look at - only 'death'.

Beyond midsummer another 'person' takes over. In Mayan terms this person is 'cauac':

9 Ch'en	10 Yax	11 Sac	12 Ceh

These four months 'bear fruit' ('grapes') and correspond to the rongorongo glyph type hua poporo:

We can identify the 4 'berries' with the four months carrying cauac signs. The 'tree' (middle sign in hua poporo with 'head' at bottom) generates the 4 'months' which follow.

One of the 4 'berries' will be used later on to generate the child to be born in midwinter, as illustrated in Aa1-13:

The same concept (one berry used up) as in the cauac glyph with fire flames:

In K, we remember, hua poporo arrived already beyond what could be midsummer (Ka5-4):

Hau tea has two 'eyes' (meaning apex) and the horizontal 'fire toes' will no longer reach us. Instead they are used for the 'fruit' (next season).

At midsummer no head is used up, it is too early. The dragon's head at the root of the tree must be responsible, the coming season is a season of water (which is down, not up where a normal person carries his head).