EID Al-Fitr is expected to be fall on Monday, but depending when the crescent moon starts to show, it may be celebrated on Tuesday.
Eid marks the end of the holy month of Ramadan, and is the Festival of the Breaking of the Fast.
During Eid, Muslims not only celebrate the end of fasting, but thank Allah for the help and strength that he gave them throughout Ramadan to help them practise self-control.
The festival begins when the first sight of the new moon is seen in the sky, and last for three days.
During Eid special services are held in Mosques, and in Muslim countries there are processions through the streets.
Families and friends also come together to exchange gifts, which are usually given to children, and to share celebratory meals.
The meals, which are eaten during daytime, will be the first daytime meal Muslims will have had in a month.
Muslims also usually buy new clothes to dress in at Eid, and visit cemetries to pay respect to lost loved ones.
At Eid it is obligatory to give money to charity, which is used to help poor people buy new clothes and food so that they too can celebrate.
Community worker Faz Patel MBE said: “Muslims in East Lancashire are really, really looking forward to Eid this year, people are looking forward to it because it’s been a long 19 to 20 hours fast.
“I will be spending time with my parents and elderly grandparents, and I’ll go round to everybody’s house eating little bits of food.
“I’ll be visiting eleven cousins’ houses, so by the end of the day I’ll have eaten so much.
“I’ll also be visiting the cemetery and offering prayers at the mosque.
“Eid is a time to celebrate the end of Ramadan, it’s a time to spend with family and friends, to give presents to our youngsters, but most of all it’s about appreciating what we have after we’ve fasted for 30 days, and we also need to not forget about poor people.”