Trinity Sunday, known as "Svatá Trojice" in Czech, is a Christian feast that celebrates the belief in the Holy Trinity, which is the Father, the Son, and the Holy Spirit. This day falls on the first Sunday after Pentecost, typically in late May or early June.

Historical Background:

• The celebration of Trinity Sunday was established in Western Christianity around the 10th century.
• It was formally accepted into the liturgical calendar by Pope John XXII in 1334.

Traditions:

• In Czechia, like in many other countries with Christian heritage, Trinity Sunday is not accompanied by as many unique customs as other feasts.
• Churches may hold special services focused on the doctrine of the Holy Trinity.
• The day is often marked by singing hymns that praise and explore the mystery of the triune God.

Modern Practices:

• For many Czechs, especially those who are not particularly religious, Svatá Trojice may pass without significant observance.
• Religious individuals might attend Mass or participate in church activities.
• It's a day for reflection on the nature of God and Christian faith rather than one associated with specific secular traditions or cultural festivities.

As a day with primarily religious significance, Trinity Sunday remains an observance largely confined to church services and personal belief rather than public celebration or widespread traditional activities.