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Eid al-Fitr, also called the "Festival of Breaking the Fast", is a religious holiday celebrated by Muslims worldwide that marks the end of the month-long dawn-to-sunset fasting of Ramadan. This religious Eid is the first and only day in the month of Shawwal during which Muslims are not permitted to fast

Explanation:

Ways to celebrate Eid ul Fitr

Festivities start the night before with chanting the Takbir and lighting lamps and fireworks. On the day itself, after Eid prayer in the morning, zakat alms for the poor are distributed in the mosques. People gather with family and neighbors in traditional clothing and have a special Lebaran meal.

why do they celebrate

Traditionally, Eid al-Fitr begins at sunset on the night of the first sighting of the crescent moon. ... As an obligatory act of charity, money is paid to the poor and the needy (Arabic: Zakat-ul-fitr) before performing the 'Eid prayer.

i guess you can say your cited source is THE INTERNET

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