The holy month of Ramadan will start on March 1 in Saudi Arabia with the sighting of a new crescent moon.
In the Islamic calendar, a new month begins with the crescent moon, which is when the moon appears as a thin sliver.
Similar to sunset and sunrise times, the new crescent moon's appearance varies in timing depending on where you are in the world.
One of the five pillars of Islam is fasting, which involves refraining from eating, drinking, smoking, harbouring sinful thoughts or deeds, and engaging in marital relations from sunrise to sunset for a whole month.
For the first time in many years, Ramadan will end before daylight saving time (March 30), meaning shorter fasts for people across the UK.
