The Complete Picture
Ask ten Catholics what the fasting rules are and you will get ten different answers. Some think you must fast every Friday. Others think fasting ended after Vatican II. Others vaguely recall something about meat but are not sure when it applies.
The rules are simpler than the confusion suggests. Here is everything the Church requires, in one place.
The Two Days of Fasting
The Church requires fasting on exactly two days per year: Ash Wednesday and Good Friday.
On a fast day, you eat one full meal and two smaller meals that together do not equal a full meal. No snacking between meals. Water and medicine are permitted at any time.
Fasting binds Catholics aged 18 to 59. If you are younger or older, you are not obliged — though you may choose to fast voluntarily.
Those who are pregnant, nursing, ill, or engaged in heavy physical labour are exempt. The Church does not ask you to harm your health. If you are genuinely unsure whether your circumstances excuse you, ask your priest.
The Days of Abstinence
Abstinence means not eating meat — the flesh of warm-blooded animals (beef, pork, chicken, lamb). Fish, eggs, dairy, and all other foods are permitted.
The Church requires abstinence on:
- Ash Wednesday
- Good Friday
- All Fridays during Lent
Abstinence binds Catholics aged 14 and over. There is no upper age limit.
In Australia, the bishops have additionally asked Catholics to observe every Friday throughout the year as a day of penance. Abstaining from meat is the traditional and simplest way to do this, but other forms of penance — extra prayer, an act of charity, giving up a pleasure — are acceptable outside of Lent.
The rules vary slightly by country. In some countries, such as England and Wales, the obligation to abstain from meat on all Fridays of the year was restored in 2011. In the United States, the bishops allow substitution of another penance outside Lent. Check your local bishops’ conference guidelines if you are unsure.
Ash Wednesday and Good Friday
These two days require both fasting and abstinence — the only days on which both obligations apply simultaneously. You eat one full meal and two smaller meals, and none of the meals include meat.
These are the strictest days in the Catholic calendar and the minimum the Church asks of every able-bodied adult Catholic.
What About the Rest of Lent?
During Lent, fasting is not required on any day other than Ash Wednesday and Good Friday. The widespread belief that you must fast for the entire forty days is a memory of older disciplines, not the current law.
However, abstinence from meat is required on every Friday during Lent — not just Good Friday. This means six Fridays in total (the Fridays of Lent plus Good Friday).
Many Catholics voluntarily take on additional fasting or penance during Lent — giving up chocolate, alcohol, social media, or other pleasures. These are commendable but not obligatory. The Church encourages them without requiring them.
The Eucharistic Fast
Separate from Lenten fasting, the Church requires a one-hour fast before receiving Holy Communion. No food and no drink — except water and medicine — for one hour before you receive the Eucharist.
This is one hour before Communion, not one hour before Mass begins. Since Communion typically occurs about forty-five minutes into Mass, you need to stop eating roughly fifteen minutes before Mass starts.
Water may be taken at any time. Medicine may be taken at any time. The elderly and the ill are exempt entirely.
What the Rules Used to Be
The current rules are far more relaxed than what Catholics observed for most of the Church’s history.
Before 1966, every Friday of the year required abstinence from meat — not just Fridays in Lent. The Eucharistic fast was from midnight, not one hour. Lenten fasting was stricter: only one full meal per day, with two smaller meals (called “collations”) that were more restricted than today. Before 1917, the Lenten fast was even stricter — no meat, eggs, or dairy during the entire season.
The relaxation came under Pope Paul VI in 1966, who issued the apostolic constitution Paenitemini. The intention was to shift the emphasis from external rules to interior conversion — to encourage Catholics to choose their own penances rather than simply following a mandatory programme.
Whether this shift achieved its goal is debated. Many Catholics stopped fasting altogether, interpreting the relaxation as an abolition. The bishops of several countries have since moved to restore clearer expectations — which is why the Australian and English bishops, among others, have reintroduced Friday penance as a year-round practice.
Beyond the Minimum
The Church’s current requirements are genuinely modest: two fast days, a handful of abstinence days, and a one-hour Eucharistic fast. For an institution that once required its members to fast from midnight and abstain from meat every Friday of the year, this is a light burden.
But the minimum is a floor, not a ceiling. The saints fasted far more than the Church required — not from masochism but from love. They found that voluntary fasting sharpened their prayer, strengthened their will, deepened their dependence on God, and freed them from the tyranny of appetite.
You do not need to become an ascetic. But if you find that your spiritual life feels sluggish, that your prayers lack focus, that your will is weak against temptation — try fasting. One day a week. One meal skipped. One pleasure surrendered. The Church’s minimum requirements are the starting point, not the destination.
The body and the soul are connected. What you do with one affects the other. Fasting is the simplest proof of this — and the saints are unanimous in saying that it works.