anyone heard of tradition of starting voyages on new moon

[Hood]

No. The notion of time is a human "creation" and so it is susceptible to inaccuracy and illusion created by imperfect calculation or by using celestial bodies to measure it. Yes I do know of ancient civilisations using planetsetc to measure time.

Once you work out that the sun and moon are not synchronised it may become clear for you.

Poll please.