Ramadan lasts for 29 or 30 days depending on the sighting of the new moon which can cause confusion as some imams say the moon has been sighted on one day and others say its been sighted on another day! But once the moon has been sighted by a reliable source usually by the imam of your local mosque, Muslims celebrate Eid Ul Fitr. It begins with a special Eid prayer and then Muslims dress up and go out and meet each other, have special meals and exchange gifts. It's traditional for Muslims to say Eid Mubarak to each other which means Happy Eid.