Days of both Fast & Abstinence: Ash Wednesday (March 5) and Good Friday (April 18).
Abstinence: Fridays of Lent (Mar. 7, 14, 21, 28; April 4, 11).
Fasting: In Roman Catholic tradition means one full meal, two smaller meals which together do not equal the size of your full meal and applies only to ages of 18 - 59.
Abstinence: In Roman Catholic tradition means to abstain from eating meat (beef, chicken, pork, turkey, etc.). The obligation of abstinence applies to all Catholics who have reached the age of 14.