Until what year did Catholics traditionally fast on Fridays?

Catholics traditionally observed a practice of fasting on Fridays, a reflection of the day of Christ's crucifixion and a period for penitential practice. This custom was part of the Church's discipline regarding fasting and abstinence, which has undergone modifications over the years. In 1966, the Catholic Church officially revised its guidelines surrounding penitential practices. This update allowed for greater flexibility in fasting rules, particularly regarding Fridays, where abstaining from meat became a more common practice rather than strict fasting. Therefore, 1966 marks the year when the traditional observance on Fridays was officially altered, making this the correct choice.