Two important points so far:

1. There is one mauga glyph in the center, probably marking summer solstice:

	1	beginning of 1st half
	75	end of 1st half
	76 (1)	beginning of 2nd half
	150 (75)	end of the 2nd half

2. The mauga glyphs mark the end of a season and they are followed by glyphs including henua, introducing a new season:

Eb4-4	Eb4-5
Eb5-11	Eb5-12
Eb2-13	Eb2-14

Red here means the first season of the year and black the last season.