Christian feast day: Mabyn (Roman Catholic Church and Anglicanism)

Mabyn, also known as Mabena, Mabon, etc., was a medieval Cornish saint. According to local Cornish tradition she was one of the many children of Brychan, king of Brycheiniog in Wales in the 5th century. The village and civil parish of St Mabyn is named for her, and the local St Mabyn Parish Church is dedicated to her.

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.

Anglicanism, also known as Episcopalianism in some countries, is a Western Christian tradition which developed from the practices, liturgy, and identity of the Church of England following the English Reformation, in the context of the Protestant Reformation in Europe. It is one of the largest branches of Christianity, with around 110 million adherents worldwide as of 2024. Most are members of national or regional ecclesiastical provinces of the international Anglican Communion, one of the largest Christian bodies in the world, and the world's third-largest Christian communion. Research from the Center for the Study of Worldwide Christianity, based at Gordon Conwell, found that there were nearly 91 million Anglicans worldwide in 2015, not including the United "churches on the Indian Sub-Continent" as they "are ecumenical federations." In 2025, the Church Times reported that, according to research conducted by researchers at Durham University and Gordon Conwell, using 2020 data provided by member churches and not counting the United churches, there were nearly 95 million Anglicans worldwide within the Anglican Communion. When united churches in the Anglican Communion and the breakaway Continuing Anglican movement were not counted, there were an estimated 97.4 million Anglicans worldwide in 2020.