Saint Patrick returned to Ireland as a missionary in 432, according to the traditional Irish chronology.
Patrick was born in Roman Britain and was carried to Ireland as a teenager by raiders. After six years of enslavement, he escaped, returned to Britain, and later felt called to go back to Ireland to preach Christianity. His own writings describe his mission but do not provide a securely dated year.
The year 432 comes from Irish annalistic tradition and became the standard date used in popular histories and trivia. It is often associated with Patrick’s arrival as a missionary bishop, rather than with his earlier arrival as an enslaved captive.
Historians treat the date cautiously. Palladius was sent by Pope Celestine I to Irish Christians in 431, and some scholars think later writers emphasized 432 to distinguish Patrick’s mission. Thus 432 is the canonical quiz answer, even though the exact chronology remains uncertain.