Milad-un-Nabi, also known as Eid-e-Milad an-Nabi, is an Islamic festival that commemorates the birth of the Prophet Muhammad. The festival is celebrated in Rabi al-Awwal, the third month in the Islamic calendar, and is observed on different days by the Shia and Sunni sects. The Sunni scholars have chosen the 12th Rabi ul-awwal to celebrate Eid Milad-un-Nabi, while some Shia scholars regard the 17th Rabi al-awwal as the accepted date. The festival is celebrated in many countries, including Saudi Arabia, Pakistan, India, Bangladesh, Sri Lanka, Russia, and Germany, and is recognized as a national holiday in most Muslim-majority countries.

The origin of celebrating Eid Milad-un-Nabi can be traced back to the early days of Islam when people used to gather and read verses to honor the Prophet. The festival serves as an opportunity for people of the Muslim community to remember and honor Prophet Muhammads life and what he stood for. Muslims celebrate the day by offering special prayers, preparing sweet delicacies, and decorating their houses.

In summary, Milad-un-Nabi is an Islamic festival that celebrates the birth of the Prophet Muhammad. It is observed in Rabi al-Awwal and is celebrated on different days by the Shia and Sunni sects. The festival serves as an opportunity for people of the Muslim community to remember and honor Prophet Muhammads life and what he stood for.