During the holy month of Ramadan, Muslims 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.
When is Ramadan 2018?
This year Ramadan, which is the ninth month in the Islamic calendar, begins on Tuesday May 15 and ends in the evening of Thursday June 14.
As the calendar is lunar, the dates for when each month begins move every year; in 2017 Ramadan began...