The answer to the question is "THE FIRST OLYMPIC GAMES"
I can't see "this" calendar.
Ancient Greek myths did not keep a calendar.
Ancient Greek myths did not use a calendar so no one knows.
The basis for a calendar.
alpha
The third month of the current calendar [March] is named after the ancient Greek Olympian god Ares [latin Mars] - the warrior god, civil order and courage.
There was an ancient Egyptian calendar, but modern Egypt uses the Coptic Calendar, which is based on the calendar of ancient Egypt.
They were the religion of the ancient Greeks.
It means:agrammatos
a long time ago
rhombus
finis is associated to ancient Greece because its an ancient greek word!