Kanathia Festival
Every year there was a procession from Argos to Nauplia. Priestesses of Hera and attendants would escort the statue of Hera to the spring Kanathos where they would bathe her image according to the sacred purification rites. It is said when the statue emerged from the water Hera Teleia became a maiden once more, Hera Parthenos, pure and virginal.
Come now, graceful Horai, goddesses of the heavenly chorus come to Hera’s grove with your pitchers and oils Let us cleanse the great queen of the seasons past and cover her in the softest silks until, shining anew, she emerges in all her glory
It is assumed this purification ritual is to prepare Hera for her marriage to Zeus. In modern day it is believed the spring is the one that runs through a nunnery, Agia Moni.
Please note: a name for this ritual is not currently known. I chose Kanathia among other suggestions for this ritual as a nod to its namesake, the Kanathos spring. This is a festival specific to the Argolid. Pausanias 2.38.2-3