Muslims celebrate 'Eid ul Fitr on the first day of Shawwal -the tenth month of the Islamic calendar, following the month of Ramadan (in which the revelation started and ended 20+ years later, and which is also the month of fasting). Following a Lunar calendar, Muslims mark the beginning of the month with the sighting of the new crescent.
Muslims attend a special community prayer in the morning and visit friends & relatives to exchange greetings of “Eid mubarak” or “a blessed Eid” joyfully.