Do not confuse fasting with abstenance. Abstaining from meat or something else is not fasting.
Fasting is cutting down the quantity of food and drink you take compared to normal food and drink intake.
Fasting rule is one normal meal and two small meals which together cannot exceed one normal meal.
Fasting is only required on Ash Wednesday and Good Friday.
I currently live and work in a Muslim country. As such I am subject by law to the Ramadan fast, at least publicly. This means no eating or drinking even water from dawn to dusk. A Muslim will break the fast with Iftar after dusk.
Thistle has well described the Catholic fast.
Many saints both fasted and abstained from meat on both Wednesdays and Friday. I was halfway through Lent, maintaining the Friday fast, when I learned that here it is Wednesday that we are asked to abstain from meat during Lent.
Fasting and abstinence are ways to pray. Letting your stomach and body’s reflexes remind you of God, and give you an occasion/reminders to talk to God.
Never fast alone. Fast with Jesus.
As Catholics we are required to fast for at least one hour before receiving Holy Communion. This fast is a total abstaining from all food and drink, except water.
As I explained to a Baptist when I refused the breakfast he had prepared, we come to the Eucharistic table “hungry for the Lord.”
As I read in the local paper, the old and ill are exempted from the Ramadan fast. This is also true for Catholics when it comes to the Lenten fast. We are not called to jeopardize our health.
Children below the age of 14 are not required to abstain from meat. Fasting on the specified days of Ash Wednesday and Good Friday is only required from 18 through 59 years of age.
No rule says that you cannot maintain a Muslim style fast with a snack size breakfast before dawn and eating your main meal after dark. Remember, however, that the Catholic fast includes abstinence from meat (fish excluded).