Sleep and performance during Ramadan
An estimated 22% of the world’s population (approximately 1.6 billion people) fast during the Muslim holy month of Ramadan. In all countries, fasting individuals do not eat, drink, or smoke from sunrise to sunset. However, due to different geography and the movement of Ramadan (11 days earlier each year), the number of hours fasting can be very different for workers distributed across wide areas. For example, when Ramadan falls in the Northern Hemisphere summer months, those in Northern latitudes will be fasting for much longer than those in Southern latitudes, and those in equatorial regions.