Comparing with the glyph number structure in G we find nothing there which contradicts the assumed 3 periods à (20+20+20) days in each half-year:

The midpoint is located between periods 9 and 10, not between 10 and 11 as in E. But that, we know, is due to the 1st period in E being counted although it does not belong to the regular year.

The autumn vero (period 19 in G) is, however, outside the regular year (not ending summer as in E).

In the G calendar 35 glyphs may correspond to 90 days, which can be expressed as 7 (after division by 5) in relation to 18 (after division by 5). 7 glyphs will then correspond to 18 days and 70 (= 10 * 7) glyphs correspond to 180 days. Sun seems to have 10 periods à 7 glyphs to live, 5 before the midpoint and 5 after.

It is as if sun has 18-day long 'weeks', though only 10 such.