Trinity Sunday · Yekshanbeh-ye Taslis

Culture of origin: Christian · Cultural

Holiday sources: Australia (national) · Canada (federal) · Christianity · France · Germany (nationwide) · United Kingdom (England and Wales) · United States (federal)

Trinity Sunday, the first Sunday after Pentecost, celebrates the Christian doctrine of one God in three persons: Father, Son and Holy Spirit. Unlike most feasts, it recalls a doctrine rather than an event. Pope John XXII, who reigned from 1316 to 1334, ordered the feast for the whole Church. It is kept by Catholic, Lutheran, Anglican, Reformed and Methodist churches and is a Principal Feast of the Church of England.