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The source links elemental worship and epic tales to Magadh and Mithila, then portrays migration as a route to broader recognition. It offers a concise interpretive overview rather than a referenced chronological history.

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Source article · Original Wave 5 wording and headings are retained below. Editorial notes are separate.

From Vedic Times to Global Phenomenon

Chhath Puja has preserved its original purity longer than nearly any other Hindu festival, mainly because it depends on nature instead of temples or priests.

Evolution of the Festival

Originating from early Vedic reverence for elemental deities (Sun, Water, Fire), the festival’s mythological foundations are embedded in the epics Ramayana and Mahabharata. Initially limited to the farming communities of Magadh and Mithila (present-day Bihar), the extensive internal migration during the 20th and 21st centuries shifted it from a localized agricultural tradition to a prominent urban and worldwide festivity.

About this edition: Taken from the provided Wave 5 article. The original short text has not been elaborated upon. Cultural interpretations are based solely on the source; this is neither a medical analysis nor an authenticated event summary.