Ash Wednesday and Good Friday are days of fasting and abstinence from meat. In addition, every Friday in Lent is a day of abstinence from meat.
Abstinence from Meat
Abstinence from the meat from any warm-blooded animal is observed by all Catholics 14 years old or older. There is no upper age limit to the obligation to abstain from meat on Ash Wednesday, Good Friday, and the Fridays of Lent. This obligation prohibits the eating of meat, but does not prohibit the eating of eggs, milk products, and condiments of any kind, even if made with animal fat.
Fasting
Fasting means limiting oneself to one full meal on Ash Wednesday and Good Friday. Catholics who have reached the age of 18 are obligated to fast on these two days until they have reached their 60th birthday. Two additional smaller meals are permitted if necessary to maintain strength. The two smaller meals together may not equal one full meal. Moreover, eating solid foods between meals on Ash Wednesday and Good Friday is not permitted.