A Black Fast is a severe form of Catholic fasting. It is the most rigorous in the history of Church legislation and is marked by austerity regarding the quantity and quality of food permitted on fasting days as well as the time when such food is legitimately taken.
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Description and practice
Traditionally, the Black Fast was undertaken during Lent and for a prescribed period of time preceding ordination.
The details of the fast, as they were prior to the tenth century, are as follows:
Orthodoxy and Eastern Catholicism
Some Eastern Catholics perform the Black Fast on Fridays during Lent, especially on Good Friday.
The Black Fast is still observed by the Eastern Orthodox on Wednesdays and Fridays, throughout Great Lent, and the three other fasting periods of the year (the Dormition Fast, Nativity Fast, and the Apostles' Fast).
Romanian Orthodox Church
The term "Black Fast" has a different connotation within the Romanian Orthodox Church, which defines it somewhat similar to the definition given by those within the realms of the Classical Pentecostal movement (see below).
Pentecostal movement
The term "Black Fast" has a different connotation with writers within Classical Pentecostalism. A Black Fast is complete abstinence from food or water and nothing is consumed in its duration. Dr. Curtis Ward teaches that the Black Fast should never extend beyond three days because of ketosis, possible kidney damage, and dehydration. He further states that nothing the New Testament says that they extended this type of fast beyond that limitation and that Christ's fast included water because "he was afterward an hungred" and was offered bread. If he had abstained from water he would have obviously craved water first and foremost. Dr. Ward states that the Black Fast, Hebrew Fast, and the Absolute Fast are synonymous terms.
The former Arthur Wallis coined the term "Absolute Fast" in 1968 in his book "God's Chosen Fast." A Normal Fast or "Complete Fast" consists of eating nothing but drinking pure water. A Partial Fast (or Daniel Fast) consists of eliminating all but one type of food or eliminating just one type of food. The Black Fast is observed on rare occasions in Pentecostal circles while the Normal Fast is most usually undertaken.