While rei miro glyphs in the Keiti calendar mark the 4 cardinal points by referring to the beginning of respective season, henua ora glyphs serve a similar function by referring to the end of a season:

Period no.			key events
1	-	Eb1-40	new year
5	Eb3-4	-	spring equinox
7	Eb3-20	-	start of the 2nd calendar quarter
10	-	Eb3-34, Eb3-37	summer solstice
18	Eb5-7	-	autumn equinox
24	Eb5-32, Eb6-4	-	winter solstice

Period 24 ties together the end of the 2nd half of the year with the beginning of the 1st half of next year by having Eb5-32 and Eb6-4 in the 24th period (although they refer to the beginning of the coming year).

Similarly, Eb1-40 is located in the 1st period although referring back to the end of the preceding year.