Eid : Id-Ul-Fitr or Eid-Ul-Fitr

Id-Ul-Fitr or Eid-Ul-Fitr, commonly known as Eid is the most
important festival of Islamic calendar. Id Ul Fitr means 'festival
of breaking the fast' and is celebrated on the first day after sighting
the moon of 'Shawaal' (tenth month of Islamic calendar) that marks
the end of the month of Ramzan(the month of fasting). During the
auspicious month of Ramzan, Muslims observes day long fast and offer
special prayers to almighty. Eid festival marks the end of Ramzan
and people all over celebrates this pious festival with
utmost devotion.