The "Feast of Creation” – also known as “Feast of Creation in Christ", "Creation Day” or “Creation Sunday” – is celebrated by many Christian churches on September 1 or the subsequent Sunday. 

Grounded in an ancient liturgical tradition of the Orthodox Church, this is a day to praise God as Creator and ponder the great mystery that everything was created through Christ. And, as a result, it also inspires us to care for the gift of the created world — which is why it also is a “World Day of Prayer for Creation”.

Theological Symbolism of September 1

Since the 7th century, September 1 has symbolized the day of God’s creation of the world in the Byzantine tradition and has been the opening feast of their liturgical year (in a parallel with the feast of Rosh Hashanah marking the Jewish New Year).

A series of ecumenical conferences, known as ‘The Assisi Process,’ has explored that rich theological symbolism and its potential to enrich the Christological nature of liturgical calendars as the ‘Feast of Creation in Christ.’ In short, the feast contains four interrelated themes: (1) God’s act of Creation, (2) Creation as Christological mystery, (3) Creation as Trinitarian mystery, and (4) Creation as sacramental and covenantal.