Ramadan is the holiest month in the Islamic calendar, observed by Muslims worldwide with fasting from dawn to sunset. Eid al-Fitr marks the end of Ramadan and is a joyous three-day festival celebrating the completion of the fast. Eid al-Fitr marks the end of Ramadan, the Muslim holy month of fasting, and is celebrated during the first three days of Shawwāl, the 10th month of the Islamic calendar• Source: Google