The festivities involve thanksgiving, merriment, feasting and the exchange of gifts and traditionally begin upon the sighting of the new moon.
A common greeting during this holiday is Eid Mubarak, which means, “Have a blessed Eid!”
The first Eid al-Fitr was celebrated in 624 CE by the Prophet Muhammad and his compatriots after the battle of Badar.
In war-torn Gaza, many Muslims were pictured marking the celebration with prayer, though for some there was no cause for merriment.
Abeer Shamali spent the celebrations tending to the grave of her teenage son, buried just four days ago.
Thaer, 16, was killed in an Israeli shelling in Shejaiya, eastern Gaza.
“How do I feel? I feel like any woman who has to bury her son on Eid. What am I supposed to do?”