timelets

For they pay honours to Poseidon on the eighth day of every month. The number eight, as the first cube of an even number and the double of the first square, fitly represents the steadfast and immovable power of this god, to whom we give the epithets of Securer and Earth-stayer.

Plutarch, The Life of Theseus.

http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Plutarch/Lives/Theseus*.html