Canada Day marks the anniversary of Canadian Confederation on July 1, 1867, when the British North America Act united three colonies into the Dominion of Canada. Its inclusion in the ACNA calendar reflects the Anglican tradition of sanctifying national life through prayer — offering thanksgiving for civil blessings while directing the nation's life toward justice and obedience to God's will. The observance is specific to Canadian Anglican churches.

The inclusion of Canada Day in an Anglican liturgical calendar reflects the tradition of praying for the nation and its leaders that runs from the earliest Christian centuries through the BCP's Prayers for the Sovereign and all in Civil Authority. The day is not a feast in the theological sense — it carries no proper collect, no assigned readings, and no liturgical color beyond the default. Its function in the calendar is to mark the civil observance and to prompt thanksgiving and intercession for the nation. Churches may celebrate with appropriate hymns (often 'O Canada' as a processional or recessional) and prayers for peace, justice, and the common good. The theological warrant is modest but real: Christians give thanks for the blessings of ordered society, confess the nation's sins and failures (particularly toward Indigenous peoples), and pray for its leaders. The ACNA calendar inherits this observance from the Anglican Church of Canada's tradition.

The Dominion of Canada was created on July 1, 1867, when the British North America Act united the Province of Canada, New Brunswick, and Nova Scotia into a federal dominion. The holiday was statutorily established as Dominion Day on May 15, 1879, and renamed Canada Day in 1982.

The Anglican Church of Canada began incorporating national commemorations into its liturgical calendar with the 1962 revision of the Canadian Book of Common Prayer, which added twenty-six post-Reformation figures and national observances. The Book of Alternative Services (1985) expanded the calendar further. The theological rationale for including national days in a church calendar follows Pauline tradition: the church prays for civil authorities and gives thanks for the blessings of ordered liberty (1 Timothy 2:1-2; Romans 13:1-7).

• Commemorated