Paz del Chaco2026 · Date · History
Paraguay’s official holiday list names 12 June as Paz del Chaco, and state media commemorated the 91st anniversary on 12 June 2026.
About Paz del Chaco
Paz del Chaco, or Día de la Paz del Chaco, is a Paraguayan national holiday associated with June 12.
Under Paraguay’s current Law 7544/2025, June 12 is a national holiday and is among the holidays the executive may move to a nearby Monday by decree.
Why Paz del Chaco matters
The date commemorates the June 12, 1935 peace protocol and ceasefire that ended hostilities in the Chaco War between Paraguay and Bolivia.
Official Paraguayan sources distinguish that 1935 ceasefire protocol from the later 1938 Treaty of Peace, Friendship and Boundaries that formalized the peace and boundary process.
History of Paz del Chaco
On June 12, 1935, Paraguay and Bolivia signed a peace protocol in Buenos Aires providing for the cessation of hostilities in the Chaco War.
Paraguay’s Foreign Ministry boundary commission describes the 1935 protocol as the starting point of a longer diplomatic process.
On July 21, 1938, the Treaty of Peace, Friendship and Boundaries was signed, a distinct later instrument in that process.
Law 7544/2025 currently lists June 12, Día de la Paz del Chaco, as a national holiday and permits the executive to move it by decree.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
Lists June 12, Día de la Paz del Chaco, as a national holiday and among the holidays that may be moved by executive decree.
Republic of Paraguay · Law No. 7544/2025
Formalized the later peace and boundary settlement after the 1935 cessation of hostilities.
Paraguay and Bolivia · Treaty of Peace, Friendship and Boundaries
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
Chaco Armistice
How to Observe Paz del Chaco
Use June 12 as the underlying holiday date while checking annual decrees for any transferred day off.
Keep the 1935 ceasefire protocol separate from the 1938 peace-and-boundaries treaty.
Describe the Paraguay-Bolivia history neutrally and avoid assigning motives beyond the reviewed sources.
Use current Paraguayan law for present holiday status rather than relying on older calendar summaries.
Paz del Chaco Facts
Día de la Paz del Chaco is associated with June 12 in Paraguay.
Law 7544/2025 lists it as a national holiday.
The current law allows this holiday to be moved by executive decree.
The date refers to the June 12, 1935 protocol ending hostilities.
The 1938 Treaty of Peace, Friendship and Boundaries is a later and separate instrument.
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.
Paraguay Ministry of Foreign Affairs, National Boundary Commission (opens in a new tab)
Paraguay National Congress / BACN (opens in a new tab)
Paraguay State Media — 91st anniversary of Peace of the Chaco, 2026 (opens in a new tab)
State Media Current Commemoration
Paraguay Ministry of Foreign Affairs — Official Holidays (opens in a new tab)
National Government Holiday List
Paraguay Ministry of Foreign Affairs, National Boundary Commission — conference on the 12 June 1935 peace protocol (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 Paz del Chaco?
12 June The documented recurrence rule is: 12 June.
Does Paz del Chaco fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is Paz del Chaco an official public holiday?
The reviewed sources verify it within this scope: Paraguay / national holiday and historical commemoration. 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 Paz del Chaco?
The documented basis is: Paraguay’s official holiday list names 12 June as Paz del Chaco, and state media commemorated the 91st anniversary on 12 June 2026.. Supporting evidence includes Paraguay Ministry of Foreign Affairs — Official Holidays. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is Paz del Chaco international or country-specific?
This observance is specific to Paraguay. Its fuller verified scope is: Paraguay / national holiday and historical commemoration.
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 Paz del Chaco?
Its underlying date is June 12, although Paraguay’s current law allows the holiday to be moved to a nearby Monday by decree.
What does June 12 commemorate?
It commemorates the June 12, 1935 peace protocol and cessation of hostilities in the Chaco War.
Was the final peace treaty also signed in 1935?
No. Official Paraguayan sources distinguish the 1935 ceasefire protocol from the later Treaty of Peace, Friendship and Boundaries signed on July 21, 1938.
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