Ha8-19 (at the position of a tamaiti) comes not far after summer solstice, which in a first approximation can be said to end with manu kake at position 400 (in day 192). However, the following days continue to tell about the great event, and the goal may be to reach (and pass) day 200:

Ha8-8	Ha8-9	Ha8-10	Ha8-11	Ha8-12	Ha8-13
193			194
Ha8-14	Ha8-15 (410)	Ha8-16	Ha8-17	Ha8-18	Ha8-19 (414)
195			196
Ha8-20	Ha8-21	Ha8-22	Ha8-23 (418)	Ha8-24	Ha8-25
197			198
Ha8-26	Ha8-27	Ha8-28	Ha8-29	Ha8-30	Ha8-31 (426)
199			200 = 142 + 58
			Here, in true H fashion, an estimated 6 glyphs are missing, the last one of which should have been *Ha8-40, indicating by way of 8 * 40 = 320 the final of the season of sun growth.
Ha8-32	Ha8-33	Ha8-34
201

Ariki in Hb3-27 comes 120 days later than ariki in Ha8-19:

			119
Ha8-17	Ha8-18	Ha8-19 (414)		Hb3-27 (774)
196				316 = 258 + 58

32 * 7 (in Hb3-27) = 224 = 8 * 28. Counting first 774 - 414 = 360 = 12 * 30, it would not then be strange to count 8 * 28 = 224. (360 + 224 = 584 = 8 * 73.)

The glyphs which surround Hb3-27 are too many and complex to show here. Only, we must notice the very clear sign of a break in time between Hb3-5 and Hb3-6 (seen also in the parallel P and Q glyphs):

Hb3-4	Hb3-5	Hb3-6 (753)
251 + 58 = 309
Pb5-10	Pb5-11	Pb5-12
Qb5-134	Qb5-135	Qb5-201

Glyph line Hb3 evidently describes some great event (at which of course the king must be present). Ariki in Hb3-27 is ca 45 days beyond autumn equinox, halfway to winter solstice.