For reactions involving oxygen, the gain of oxygen implies the oxidation of the atom or molecule to which the oxygen is added (and the oxygen is reduced). In organic compounds, such as butane or ethanol, the loss of hydrogen implies oxidation of the molecule from which it is lost (and the hydrogen is reduced).
In Ethiopian Orthodoxy, fasting (tsome) lasts for 55 continuous days before Easter (Fasika), although the fast is divided into three separate periods: Tsome Hirkal, eight days commemorating an early Christian figure; Tsome Arba, forty days of Lent; and Tsome Himamat, seven days commemorating Holy Week.
15 Fasts for Lent. Fasting is a path to peace and happiness. That's right: fasting, the practice of abstaining from food or drink for meals, days, and even weeks at a time, is one of the most powerful ways we have of becoming closer to God and finding true joy. Self-denial leads to a greater sense of wholeness. That's why Christians have fasted for thousands of years, and it's why Lent, the 6-week period etween Ash Wednesday and Easter, is a time of serious fasting. Unless you're an Orthodox Christian, however, you don't have to simply fast from food.