Before terminating this rather long discussion I must take the opportunity to point at the form of the redmarked glyphs below:

Ha5-49	Ha5-50	Ha5-51	Ha5-52	Ha5-53	Ha5-54	Ha5-55
Ha5-56	Ha5-57	Ha5-58	Ha5-59	Ha6-1	Ha6-2	Ha6-3
Ha6-4	Ha6-5	Ha6-6	Ha6-7	Ha6-8	Ha6-9	Ha6-10
Ha6-11	Ha6-12	Ha6-13	Ha6-14	Ha6-15	Ha6-16	Ha6-17

I suggest they are meant to represent 'Mount Meru' (though drawn compressed and turned on its side), by which I mean the hourglass conception of the sky.

The central vertical line indicates when Sun is close by, i.e. the time of the day when it is hot. The line at left is dawn and the line at right is evening, when Sun is not so close. The central line is shorter.

By the logic of correspondences the path of the Sun from birth to end during spring can be used also in a calendar for the daylight. This explains why a.m. Sun is represented by 'broad daylight' (broad 'hourglasses') while the Moon glyphs (twice as many) are slender.