Ea5-16--17:

These two fishes are located at the end of a calendar for the week, i.e. among the glyphs for Saturday.

The duplicity is a sign which means that we should repeat the word îka, arriving at îka-îka. The method is the same as in ahi-ahi, an indication that the rongorongo writing system is suitable to the Polynesian mentality. The texts can easily be read aloud in the old Rapanui language.

The double wedges presumably means that there are 2 + 2 = 4 weeks in a month (or rather: in the time during which the moon is visible, 28 nights).

Hb9-53 and Pb11-102:

In Saturday as represented in the week according to Large Santiago respectively Large St Petersburg there are also two fishes, and these should be read in the same way, as îka-îka.

Probably Saturn was called Ïka-îka in the old Rapanui language.

In the Hawaiian islands Jupiter was called Ikaika ('brilliant'), but Jupiter and Saturn are planets which often in later times were confused with each other. (Makemson)