Anniversary of the Statute of Westminster2026 · Date · History · Messages
Canadian Heritage states that the anniversary of the Statute of Westminster is celebrated each year on December 11 and describes the associated federal flag protocol.
About Anniversary of the Statute of Westminster
Canada marks the Anniversary of the Statute of Westminster each year on 11 December, with a federal flag protocol involving the Royal Union Flag where physical arrangements allow.
The date refers to the Statute of Westminster, 1931, a United Kingdom Act that gave legal effect to resolutions from the 1926 and 1930 Imperial Conferences and affirmed legislative autonomy for the self-governing Dominions, including Canada.
Why Anniversary of the Statute of Westminster matters
For Canada, the statute is an important constitutional milestone in the development of legislative autonomy from the United Kingdom.
The anniversary should be distinguished from the statute itself: the Act was enacted on 11 December 1931, but the reviewed current government page does not identify the separate act or date that first created the recurring commemorative observance.
History of Anniversary of the Statute of Westminster
Justice Canada reproduces the Statute of Westminster, 1931 and dates it 11 December 1931.
Canadian Heritage states that the anniversary of the establishment of the Statute of Westminster is celebrated each year on December 11.
Canadian Heritage also describes a federal flag protocol under which the Royal Union Flag may be flown alongside the National Flag on federal buildings and establishments where physical arrangements permit.
What the evidence establishes
Confirmed institutional roles and milestones are shown first. Details that could not be established from the reviewed sources are listed separately below.
7 fields not established in reviewed sources
How to Observe Anniversary of the Statute of Westminster
Read the Statute of Westminster text and Canadian Heritage’s anniversary page together to separate the 1931 constitutional act from the later commemoration.
Explore how the 1926 and 1930 Imperial Conferences preceded the statute and influenced the legal relationship among the self-governing Dominions and the United Kingdom.
Review Canada’s flag protocol for the day before describing how federal institutions mark the anniversary.
Compare the statute’s historical role with later constitutional developments, including the Constitution Act, 1982, without treating one milestone as the whole story of Canadian constitutional autonomy.
Anniversary of the Statute of Westminster Facts
The Anniversary of the Statute of Westminster is marked in Canada on 11 December.
The Statute of Westminster, 1931 is dated 11 December 1931.
Canadian Heritage describes the statute as a major milestone in Canada’s constitutional development and legislative autonomy.
Federal flag protocol permits the Royal Union Flag to be flown alongside the National Flag where appropriate physical arrangements exist.
The reviewed sources do not identify the separate instrument or first year that established the recurring anniversary observance itself.
Anniversary of the Statute of Westminster Messages
May the Anniversary of the Statute of Westminster be approached with care for historical context, accurate information and respect for the people and institutions connected with the commemoration.
For those observing the Anniversary of the Statute of Westminster, the day can be a time to learn from documented history without turning commemoration into a claim the sources do not support.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
- Remembrance Civic Context Care.
Evidence & sources
Sources used across the guide are gathered here. Labels show how each source supports the page, and contextual references are kept separate from primary evidence.
Canadian Heritage — Anniversary of the Statute of Westminster (opens in a new tab)
National Government
Justice Canada — Statute of Westminster, 1931 (opens in a new tab)
Canadian Heritage — foreign flags in Canada (opens in a new tab)
National Government
Justice Laws Website — Constitution Acts, 1867 to 1982 (opens in a new tab)
Understand it, compare it, then explore further
Start with the most common factual questions, then compare closely related observances and explore useful connections.
Frequently asked questions
When is Anniversary of the Statute of Westminster?
11 December annually The documented recurrence rule is: 11 December.
Does Anniversary of the Statute of Westminster fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is Anniversary of the Statute of Westminster an official public holiday?
The reviewed sources verify it within this scope: Canada / federal commemorative and flag protocol. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when reliable evidence explicitly does so.
Who established or recognizes Anniversary of the Statute of Westminster?
The documented basis is: Canadian Heritage states that the anniversary of the Statute of Westminster is celebrated each year on December 11 and describes the associated federal flag protocol.. Supporting evidence includes Canadian Heritage — Anniversary of the Statute of Westminster. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is Anniversary of the Statute of Westminster international or country-specific?
This observance is specific to Canada. Its fuller verified scope is: Canada / federal commemorative and flag protocol.
How is this page verified?
The factual information is checked against reviewed sources, including the date pattern, scope and institutional history. This page was checked on 2026-09-08.
When is the Anniversary of the Statute of Westminster in Canada?
It is marked each year on 11 December.
Why is December 11 used?
The Statute of Westminster, 1931 was enacted on 11 December 1931.
Did the Statute of Westminster itself create the modern annual anniversary observance?
The statute is the historical event being commemorated; the reviewed Canadian sources do not identify a separate clause in the 1931 Act creating the annual anniversary observance.
Other observances on December 11
These observances are also listed on December 11, 2026.
International Mountain Day
A/RES/57/245
Proclamation of the Republic of Upper Volta / 11 December national-day context
The Presidency of Burkina Faso states that the Republic of Upper Volta was proclaimed on 11 December 1958. Current government sources call 11 December the national celebration and frame it…
UNICEF founding anniversary
UNICEF states that the United Nations established UNICEF on 11 December 1946; the date supports a founding-anniversary page rather than a formal UN “UNICEF Birthday” observance.