Tag, just about everything but no Post Mathematical Rock. Damn.

Gahambars / gahanbars are six seasonal festivals or high feasts when Zoroastrians assemble to eat and share food communally. They are joyous occasions at which rich and poor met together, new friendships are formed and old disputes resolved. While each gahambar traditionally spans five days, nowadays it is the last day that is usually observed. The Gahambars are the only festivals mentioned in the Zoroastrian scriptures, the Avesta. Some authors such as Mary Boyce feel it is reasonable to conclude that the Gahambars were instituted by Zarathushtra himself.

Gahambars are a demonstration of beliefs, principles and values in action and are an expression of piety in thought, word and deed. Next to Nowruz, gahambars are festivals of special significance for Zoroastrians.

Interesting. In Western culture, festivals are cluttered only with laser light shows, rising stages that revolve, bad music, and loads of drugged out people with stupid smiles on their faces. No expressions of piety in thought, word or deed.