Feast day of Our Lady of Lourdes (Catholic Church), and its related observance World Day of the Sick (Roman Catholic Church)

The World Day of the Sick is an awareness day, or observance, in the Catholic Church intended for "prayer and sharing, of offering one's suffering for the good of the Church and of reminding everyone to see in his sick brother or sister the face of Christ". The day was instituted on 13 May 1992 by Pope John Paul II and is celebrated on 11 February, also the memorial of Our Lady of Lourdes. The Day is not a liturgical celebration.

The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institutions and has played a prominent role in the history and development of Western civilization. The Church consists of 24 sui iuris (autonomous) churches, including the Latin Church and 23 Eastern Catholic Churches, which comprise almost 3,500 dioceses and eparchies around the world, each overseen by one or more bishops. The pope, who is the bishop of Rome, is the chief pastor of the church.

February 11 is the 42nd day of the year in the Gregorian calendar; 323 days remain until the end of the year.