It is to celebrate a Muslim's triumphant effort for having fasted a whole month...

Marking the end of the Islamic holy month of Ramadan is the festival of Eid.

My Muslim friend told me what it meant and I did some googling too

End of fasting month and time of forgiveness?

Celebration at the end of Ramadan

Festival of breaking fast?

Guess need to learn more

Would love to know more

Yes the fasting month

The fasting month