Solemnity of the Assumption of the Blessed Virgin Mary2026 · Date · History · Messages
Vatican sources identify August 15 as the Solemnity of the Assumption, document an established August 15 celebration by the fifth century, and distinguish that ancient feast from Pope Pius XII’s 1 November 1950 dogmatic definition.
About Solemnity of the Assumption of the Blessed Virgin Mary
The Solemnity of the Assumption of the Blessed Virgin Mary is observed by the Catholic Church on August 15.
Vatican sources describe the August 15 feast as ancient and clearly distinguish its long liturgical history from the formal dogmatic definition issued in 1950.
Why Solemnity of the Assumption of the Blessed Virgin Mary matters
Catholic doctrine teaches that Mary, at the completion of her earthly life, was assumed body and soul into heavenly glory.
That doctrinal statement is presented here as Catholic belief. Readers from other traditions may understand or observe the day differently.
History of Solemnity of the Assumption of the Blessed Virgin Mary
Vatican News states that an August 15 celebration was already established by the fifth century and that the feast was celebrated in Rome by the middle of the seventh century.
On November 1, 1950, Pope Pius XII issued the apostolic constitution Munificentissimus Deus, formally defining the Catholic dogma of the Assumption.
The 1950 definition therefore represents a doctrinal action within a much older feast tradition rather than the origin of the August 15 observance.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
Formally defined the Catholic dogma of the Assumption; this was a doctrinal definition and did not create the already ancient August 15 feast.
Pope Pius XII / Holy See · Apostolic Constitution Munificentissimus Deus
Catholic Church / Holy See
The Holy See continues to publish and observe the August 15 solemnity.
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.
8 fields not established in reviewed sources
Later institutional actions
Later recognition, renaming, mergers or date changes are kept separate from original establishment.
Also known as
Feast of the Assumption
How to Observe Solemnity of the Assumption of the Blessed Virgin Mary
Attend a Catholic liturgy if that is part of your faith practice.
Read the historical section of a Vatican source to distinguish the ancient feast from the 1950 dogmatic definition.
Use respectful, attributed language when discussing Catholic beliefs about Mary.
Explore how local Catholic communities mark August 15 without assuming that customs are identical everywhere.
Solemnity of the Assumption of the Blessed Virgin Mary Facts
The Catholic solemnity is observed on August 15.
Vatican News says an August 15 celebration existed by the fifth century.
The feast was celebrated in Rome by the middle of the seventh century.
Pope Pius XII formally defined the dogma on November 1, 1950.
The 1950 definition did not create the much older August 15 feast.
Solemnity of the Assumption of the Blessed Virgin Mary Messages
Wishing Catholic communities a meaningful Solemnity of the Assumption.
May August 15 be a peaceful day of faith, reflection and community for those who observe it.
May today offer space for prayer, reflection and respect for longstanding traditions.
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.
- Faith Context Respect.
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.
Holy See / Vatican
Vatican News
Holy See — Munificentissimus Deus, 1 November 1950 (opens in a new tab)
Holy See Primary Document
Vatican News — Solemnity of the Assumption (opens in a new tab)
Official Faith Authority
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 Solemnity of the Assumption of the Blessed Virgin Mary?
15 August annually in the Roman Catholic calendar The documented recurrence rule is: 15 August.
Does Solemnity of the Assumption of the Blessed Virgin Mary fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is Solemnity of the Assumption of the Blessed Virgin Mary an official public holiday?
The reviewed sources verify it within this scope: Catholic Church / Roman liturgical calendar. 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 Solemnity of the Assumption of the Blessed Virgin Mary?
The documented basis is: Vatican sources identify August 15 as the Solemnity of the Assumption, document an established August 15 celebration by the fifth century, and distinguish that ancient feast from Pope Pius XII’s 1 November 1950 dogmatic definition.. Supporting evidence includes Vatican News — Solemnity of the Assumption. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is Solemnity of the Assumption of the Blessed Virgin Mary international or country-specific?
No single country is assigned to this observance. Its documented scope is: Catholic Church / Roman liturgical calendar. Use that scope rather than assuming worldwide or country-specific status.
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 2026-09-26.
When is the Catholic Solemnity of the Assumption?
It is observed on August 15.
Did the feast begin in 1950?
No. Vatican sources describe an August 15 celebration by the fifth century; 1950 is the date of Pope Pius XII’s formal dogmatic definition.
What did Munificentissimus Deus do?
The 1950 apostolic constitution formally defined the Catholic dogma of Mary’s Assumption.
How should the doctrine be described for a general audience?
Present it explicitly as Catholic teaching or belief rather than as a universally shared claim.
Other observances on August 15
These observances are also listed on August 15, 2027.
Asunción de la Virgen
Spain’s national labor-holiday regulation lists 15 August as Asunción de la Virgen within the national holiday framework.
Founding anniversary of Asunción
Paraguay’s Chamber of Deputies and the Municipality of Asunción mark 15 August as the city’s founding anniversary and identify 1537 as the founding year.
Fundación de Panamá la Vieja / Foundation of Panama Viejo
Panama’s Law 14 of 20 January 1955 recognizes 15 August 1519 as the foundation date of Panama City and declares 15 August each year a holiday for the District of Panama; municipal and herit…
Independence Day
Republic of the Congo laws directly list August 15 as the national holiday, including Law No. 19-2010, which adopts August 15 of every year in commemoration of the proclamation of independe…
Independence Day
The Indian Independence Act 1947 establishes the August 15, 1947 constitutional transition, while current Government of India sources independently verify annual August 15 Independence Day…
National Acadian Day
Government of Canada / Canadian Heritage; celebrated since 1881 and recognized in federal law in 2003