The celebration itself is not directly linked to any specific historical events but is rather a breaking of fast.
Eid al-Fitr is a time for Muslims to give in charity to those in need and to celebrate with family and friends the completion of a month of blessings and joy.
Nightly prayers called Tarawih are also held in mosques after iftar.
Different cultures have different traditions during Ramadan, whether it is a special food they must cook, or eating iftar with the extended family.
Each of twelve lunar months has 29 or 30 days, beginning when the crescent moon appears in the sky.
Because the year loses 11 days with respect to the Gregorian solar calendar, the month of Ramadan shifts forward 11 days each year, as does Eid al-Fitr.
Eid al-Fitr or the "Festival of Breaking the Fast" is one of the most celebrated of all Muslim holidays, observed by 1.6 billion Muslims around the world.
During the entire month of Ramadan, Muslims observe a strict fast and participate in pious activities such as charitable giving and peace-making.
Other acts of worship such as prayer, reading the Quran and charity are also encouraged during the holy month.
Muslims also believe the Quran was revealed in Ramadan.