Diversity in endocrinology practice: the case of Ramadan.

Muslims currently account for 1%-10% of the population in Western Europe (http://www.pewforum. org/2011/01/27/tablemuslimpopulationgrowthbycountry). It is obligatory for every Muslim to fast once a year, and specifically during the month of Ramadan.1 Ramadan migrates over the seasons since its dates are based on the lunar calendar. It starts with the New Moon and ends with a three-day celebration called Eid al-Fitr (End of Fasting Feast, i.e. Small Holiday).