The Death of Prophet Muhammad occurs annually on the 28th day of the Islamic month of Safar and this year, that falls on September 14. Each year the date of the public holiday in Iran changes based on the sightings of the moon. Not only does this day commemorate the Death of Prophet Muhammad but also the Martyrdom of Imam Hassan. Both of these are important events to Shi’a Muslims.
The day is observed with a simple dinner followed by prayers and a sermon at the mosque. The observance provides followers an opportunity to focus on the important teaching of the Prophet. The basic teachings are to be good and do good and to refrain from doing immoral things and committing vices.