Which ancient Iranian religion is commonly linked with the pre-Islamic roots of Nowruz?

Zoroastrianism is commonly linked with the pre-Islamic roots of Nowruz. The festival’s seasonal symbolism, emphasis on light, renewal, purity, and the renewal of the natural world fit themes that were important in ancient Iranian religious culture.

Nowruz predates Islam and is associated with the Iranian cultural sphere rather than belonging exclusively to one religious community. Zoroastrian communities, including Parsis in India and Zoroastrians in Iran, continue to observe their own forms of the festival. Muslim, Baha’i, Kurdish, Central Asian, and other communities also celebrate it.

The exact ancient origin is debated by historians, and surviving evidence does not reduce Nowruz to a single ritual or text. Achaemenid and later Iranian traditions are frequently discussed, but the modern festival developed through centuries of cultural change.