The holiday, 'Death of Prophet Muhammad/ Martyrdom of Imam Hassan' is a significant observance in Iran. This special day marks two important dates in Islamic history: the passing away of Prophet Muhammad, the founder of Islam, and the martyrdom of Imam Hassan, the grandson of Prophet Muhammad. It's an occasion where Iranians display their devotion and respect for these historic figures, and it portrays the deep Islamic heritage of the country.

On this special day, Iran is draped in an atmosphere of solemnity. The religious segment of the country's population observes the holiday through prayer, fasting, and other religious rituals, such as reading Quran and Sufi poetry. There are also various mourning ceremonies held in mosques and husseiniyas, where participants show their respect and sorrow through self-flagellation rituals and passion plays that depict the tragic events of Karbala.

Despite the mournful atmosphere, this holiday is seen as a time of unity and reflection in Iran. Iranians gather with friends and family, exchange stories about the life and teachings of the Prophet Muhammad and Imam Hassan, and participate in communal feasts. Even with the passage of time, the holiday still holds an important place in the hearts of many Iranians, constantly reminding them of the sacrifices that shaped their belief and the lessons they can learn from these significant figures in Islamic history.