Hb5-17	Hb5-18	Hb5-19 (864)		Gb5-10 (364)

Let us count the distance from the first two of the tahana glyphs. The arrangement around the first two suggests that either we say that day 50 or day 52 is what counts (it should be an even number):

Ha3-37	Ha3-38	Ha3-39	Ha3-40	Ha3-41	Ha3-42
49			50

Ha3-43	Ha3-44	Ha3-45	Ha3-46	Ha3-47	Ha3-48 (156)
51			52

Considering day 290 at Hb5-25 (a 'fire cube'), the natural choice ought to be 50, because then there will be 240 days to day number 290:

			717
Ha3-40 (148)	Ha3-41	Ha3-42		Hb5-23	Hb5-24	Hb5-25 (870)
240				290

It should here be mentioned that the first two glyph lines (Ha1-Ha2) together have 108 glyphs = 36 days, which means that before Ha3-40 (with 3 * 40 = 120) there are 36 + 13 = 49 (= 7 * 7) days. A square number initiates the text of H. Then follow 240 days up to what probably is the limit of the sun (day 290). Tahana glyphs evidently are involved in defining the beginning and end of a season which possibly is divided into 8 months à 30 days.

432 (the number of days in the H text) - 240 = 192 = 4 * 48 days. One of these 48-day periods could be from Ha1-1 up to Ha3-37.

			138
Ha1-1 (1)	Ha1-2	Ha1-3		Ha3-34	Ha3-35	Ha3-36 (144)
48

3 * 36 = 108 and 12 * 12 = 144. Several signs are helping us here: 36 is a square number referring to the sun and so is 144. 3 could be read as a sign to count 3 glyphs per day.

4 * 48 (= 192) can also be regarded as 8 * 24, and if so, we will have 432 = 18 * 24. Alternatively we can see 240 as equal to 5 periods with 48 days in each, i.e. 432 = 9 * 48.