Next we should consider the right part (tagata) of Gb5-12, which obviously has a sign in form of a strange bulbous leg:

Gb5-12	Gb5-13

Tagata indicates a 'fully grown' season, we have learnt, a fact which agrees with interpreting Gb5-12 as standing at the end of the first half of the 'dark' season. The season which is 'fully grown' presumably stretches from midsummer.

A bulbous leg on tagata glyphs is not a very common sign. But we have an instance in Saturday:

Hb9-51	Hb9-52	Hb9-53	Hb9-54
Hb9-55	Hb9-56	Hb9-57	Hb9-58

Saturday is the 'dark' day of the week, and also the last one. The concept appears to be similar, especially considering the half hidden sign of haga rave at right in Hb9-51 (not to mention the fishes following).