2. Venus is the most brilliant of the planets and the regular intervals with which she appears every morning, then suddenly vanishes, later to return for an equally long time in the evening sky, must have drawn the attention of early man.

Here was a regularity which could be relied upon for keeping the time, a 'person' who like the moon had two 'faces' and like the moon was invisible for a while.

We know the new moon was welcome when she returned. Likewise we can expect the return of Venus as morning star (comparable to the arrival of new moon) as a day to be celebrated. New moon defines the beginning of the month, and the return of the morning star could define the beginning of another and longer period of time, the cycle of Venus.

Possibly the rongorongo writers may have used the following division (koti) of the 584-day Venus cycle into phases:

The difference between H and P in their description of Friday may be due to what they had in mind:

morning star and evening star		the orbit of Venus is divided
	Hb9-50		Pb10-54

The number for Pb10-54 maybe alludes to the fact that a pentagon (which Venus describes in the sky, visiting only 5 of the zodiacal constellations - Taurus, Sagittarius, Cancer, Aquarius, Virgo) measures 360 + 180 = 540° (equal to 10 * 54).

Moreover, if the suggested division of the Venus cycle is correct, then 284 (morning star) + 260 (evening star) = 544 - which by being 4 more than 540 resembles 4 * 91 = 364 (4 more than 360).