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Trinity Sunday in Australia

Many Christians in Australia celebrate Trinity Sunday, which is the first Sunday after Pentecost. It is one of the few feasts that are celebrated as a doctrine instead of an event. It is also symbolic of the unity of the Trinity.

The Holy Trinity Detail
The trinity comprises the Father, Jesus the son (image pictured above), and the Holy Spirit, according to Christian belief.
The trinity comprises the Father, Jesus the son (image pictured above), and the Holy Spirit, according to Christian belief.

What Do People Do?

Many Christian churches in Australia celebrate Trinity Sunday. It is an opportunity for the congregation to learn about or revisit the concept of the trinity, which refers to the Father, Son and Holy Spirit being one God. The Nicene Creed is often included in some church services, particularly within the Catholic churches, on Trinity Sunday. Many people see this creed as one that professes the Christian faith.

Many Christian schools, churches or Christian organizations that run Sunday schools may also have special lessons that teach children about the trinity. Sunday school activities may include songs, poems, group discussions, and coloring tasks.

Public Life

Trinity Sunday is not a public holiday throughout Australia.


Pope Gregory IX instituted Trinity Sunday in 828 CE. This day is known for being the only major Christian festival that celebrates a church doctrine rather than an event in its sacred history. It is dedicated to the Christian belief in the Trinity – Father, Son and Holy Spirit – and falls on the Sunday following Pentecost each year. The belief of one God in three elements is a distinctive of the Christian faith but the early church was plagued by contrary views. Trinity Sunday spread throughout the western church around the 14th century CE.


In some churches, the liturgical color is white on Trinity Sunday. Images of the Trinity of the Father, Son and Holy Spirit depict that there are three elements of one God. The Trinity is sometimes symbolized by a triangular shape formed by three overlapping oval rings or loops, each featuring the one of the following images: the crown (father) within the top loop; the lamb (son) within the second loop (clockwise); and the dove (spirit) within the third loop (clockwise). Other shapes depicting the Trinity include Borromean rings and the triquetra.

The Borromean rings feature three overlapping round circles forming a triangular shape, and in the center, inside all the circles is the word "unitas". The Borromean rings are named after the crest of the Borromeo family in 15th-century Tuscany.

The triquetra symbol uses shapes similar to one of the oldest Christian symbols. In the triquetra, the three equal arches of the circle express the equality of the Father, Son, and Holy Spirit. The union of the arches represents the unity of the Godhead. Their continuous form symbolizes eternity. Their interwoven appearance denotes the indivisibility of the Trinity. In the center of the triquetra is an equilateral triangle, one of the most ancient Trinity symbols, and each pair of arches formed an ellipse, the symbol of God’s glory.

About Trinity Sunday in other countries

Read more about Trinity Sunday.

Trinity Sunday Observances

WeekdayDateYearNameHoliday typeWhere it is observed
SunMay 302010Trinity SundayChristian 
SunJun 192011Trinity SundayChristian 
SunJun 32012Trinity SundayChristian 
SunMay 262013Trinity SundayChristian 
SunJun 152014Trinity SundayChristian 
SunMay 312015Trinity SundayChristian 
SunMay 222016Trinity SundayChristian 
SunJun 112017Trinity SundayChristian 
SunMay 272018Trinity SundayChristian 
SunJun 162019Trinity SundayChristian 
SunJun 72020Trinity SundayChristian 

Quick Facts

Many churches in Australia observe Trinity Sunday, a Christian feast that occurs on the first Sunday after Pentecost.

Trinity Sunday 2015

Sunday, May 31, 2015

Trinity Sunday 2016

Sunday, May 22, 2016


Name in other languages

Trinity SundayEnglish

List of dates for other years

Related holiday

Other holidays in May 2016 in Australia

United Nation Holiday on May 31, 2016

Fun Holiday on May 31, 2016

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