There are a number of rules for abstinence in every religion. To abstain means to keep away. Some religious rules specify foods, some days of the week, some months of the year and some even clothing. Following these rules depends upon the rigidity of the society and the individual. The basic idea behind specifying abstinence is to identify with a particular incident cited within the holy books or to exercise control over certain cravings and urges.
The Catholic religion does advocate days of abstinence like the period of Lent and Good Friday, which coincide with the period during which Jesus fasted and prayed, prior to his crucifixion. The fasting on those days is done to pay homage to the memory of Christ's suffering and sacrifice. Those Catholics, who do not fast for all the forty days of the Lenten period, do so on Good Friday and abstain from meat on every Friday in Lent. They also abstain from the consumption of alcohol and celebrations, identifying with the Passion of Christ. Traditionally, the Catholics do not consume meat on Fridays. But, there is no rule as such for the consumption of eggs. They do consume eggs and fish on Fridays. This restriction however, is only followed by those who wish to adhere to tradition.
The Catholic religion does advocate days of abstinence like the period of Lent and Good Friday, which coincide with the period during which Jesus fasted and prayed, prior to his crucifixion. The fasting on those days is done to pay homage to the memory of Christ's suffering and sacrifice. Those Catholics, who do not fast for all the forty days of the Lenten period, do so on Good Friday and abstain from meat on every Friday in Lent. They also abstain from the consumption of alcohol and celebrations, identifying with the Passion of Christ. Traditionally, the Catholics do not consume meat on Fridays. But, there is no rule as such for the consumption of eggs. They do consume eggs and fish on Fridays. This restriction however, is only followed by those who wish to adhere to tradition.