Ramadan 2018: Why Muslims celebrate the revelation of the Koran

During the holy month of Ramadan, Muslims around the world and across the UK endure a period of daily fasting – the biggest act of religious observance of its kind. 

For the world's 1.8 billion Muslims, including Britain's 3.1 million-strong Muslim community, the annual event represents a time to fast and devote a particular focus to prayer, purification and charitable acts. 

From why the month of Ramadan moves to how it is celebrated, here is your guide to the holy month.