Various religions prescribe or recommend religious or faith-based fasting. Examples from the Abrahamic religions include Lent in Christianity and Yom Kippur, Tisha B'av, Fast of Esther, Fast of Gedalia, the Seventeenth of Tammuz, and the Tenth of Tevet in Judaism. Muslims fast during the month of Ramadan each year. The fast includes refraining from consuming any food or liquid from the break of dawn until sunset.
Details of fasting practices differ. Oriental Orthodox Christians and Eastern Orthodox Christians fast during specified fasting seasons of the year, which include not only the better-known Great Lent, but also fasts on every Wednesday and Friday (except on special holidays), together with extended fasting periods before Christmas (the Nativity Fast), after Easter (the Apostles Fast) and in early August (the Dormition Fast).
View the full Wikipedia page for Religious fasting