A w eek of walking in the south of France, culminating in a three-day trek.
Even kids far too young to start at Hogwarts can dress in Gryffindor or (eek) Slytherin robes.
Gr eek culture had, however, both in " Hellenic " and " Hellenistic " times, a common essence, just as light is light whether in the original luminous body or in a reflection, and to describe this by the term Hellenism seems most natural.