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Zoroastrianism
Primary topics Ahura Mazda Zarathustra Asha Vohu Manah Persia/Iran Faravahar Avestan
Divine entities Amesha Spentas Yazatas Ahuras Daevas Fravashi Angra Mainyu
Scripture and worship Avesta Ashem Vohu Ahuna Vairya Yenghe hatam Airyaman ishya Fire Temples 101 Names of Ahura Mazda Adur Burzen-Mihr Adur Farnbag Adur Gushnasp Cypress of Kashmar Gathas Yasna Vendidad Visperad Yashts Khordeh Avesta The Revayats Ab-Zohr
Accounts and legends Dēnkard Bundahišn Book of Arda Viraf Book of Jamasp Story of Sanjan Chinvat Bridge Frashokereti
History and culture Zurvanism Mazdakism Khurramites Calendar Festivals Initiation Kushti Sedreh Marriage Burial
Adherents Zoroastrians in India Zoroastrians in Iran Parsis Zoroastrianism in the United States Iranis Persecution of Zoroastrians
Related topics Criticism of Zoroastrianism
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Zartosht no-diso, or Zarthost no deeso, is an important day of remembrance in the Zoroastrian religion. It is a commemoration of the death anniversary of the prophet Zoroaster. It is observed on the 11th day (Khorshed) of the 10th month (Dae). In the seasonal calendar, Zarthost No-Diso falls on December 26.

It is an occasion of remembrance with lectures and discussions held on the life and works of the prophet. Attendance at the fire temple is very high during this occasion. A much higher number of mobeds are brought to pray at the Atash Behrams and Atash Adarans. There is no mourning in the Zoroastrian religion, only remembrance and worship of the Farohars of the departed.

However, Zoroaster's death is not mentioned in the Avesta. Nonetheless, in the Shahnama 5.92,^[1] he is said to have been murdered at the altar by the Turanians in the storming of Balkh.