International Mud Day2026 · Date · History
World Forum Foundation / Nature Action Collaborative for Children
About International Mud Day
International Mud Day is observed on 29 June.
World Forum Foundation records the first International Mud Day on 29 June 2011 and says the event became annual thereafter.
Why International Mud Day matters
The observance grew from an early-childhood nature-play discussion about children’s different opportunities and barriers to playing with mud.
Its international identity comes from the World Forum early-childhood community rather than from a government or United Nations proclamation.
History of International Mud Day
The idea began in 2009 at the World Forum for Early Childhood Care and Education in Belfast.
World Forum Foundation says Nature Action Collaborative for Children members Gillian McAuliffe of Australia and Bishnu Bhatta of Nepal discussed contrasting challenges around children and mud play.
The World Forum sponsored the first International Mud Day on 29 June 2011, with parents, teachers and children in Nepal participating.
World Forum Foundation states that International Mud Day became an annual event after the 2011 first observance.
Current World Forum materials continue to host Mud Day history/resources through its nature-focused working-group network.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
Bishnu Bhatta (Nepal) and Gillian McAuliffe (Australia)
World Forum Foundation says International Mud Day was inspired by their 2009 conversation within the Nature Action Collaborative for Children.
World Forum Foundation / Nature Action Collaborative for Children
World Forum Foundation describes the observance as created at a Nature Action Collaborative working-group meeting and says the World Forum sponsored the first event.
First documented observance
World Forum Foundation explicitly states that it sponsored the first International Mud Day on 29 June 2011.
World Forum Foundation, through its Nature Action Collaborative for Children / nature working-group network
World Forum Foundation continues to maintain the Mud Day history and participation resources within its nature-focused working-group structure.
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.
5 fields not established in reviewed sources
How to Observe International Mud Day
Use 29 June for International Mud Day.
Frame the day around play, nature connection and early-childhood/community participation rather than inventing governmental status.
When describing its origin, credit the World Forum/Nature Action Collaborative context and the Bhatta–McAuliffe conversation.
Do not claim a legal proclamation or UN designation; none is part of the reviewed first-party history.
International Mud Day Facts
International Mud Day is June 29.
The idea began in 2009 in the World Forum early-childhood community.
Bishnu Bhatta and Gillian McAuliffe are named by World Forum Foundation in the origin story.
The first International Mud Day was sponsored by the World Forum on 29 June 2011.
World Forum Foundation says the observance became annual thereafter.
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.
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.
World Forum Foundation — history (opens in a new tab)
Organizer History Page
World Forum Foundation — Mud Day (opens in a new tab)
Organizer Dedicated Page
World Forum Foundation — Mud Day is Almost Here!, 28 May 2019 (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 International Mud Day?
29 June The documented recurrence rule is: 29 June.
Does International Mud Day fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is International Mud Day an official public holiday?
The reviewed sources verify it within this scope: international early-childhood nature-play observance. 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 International Mud Day?
The reviewed sources identify World Forum Foundation / Nature Action Collaborative for Children as the proclaiming or establishing body. The proposer or originator is recorded separately as Bishnu Bhatta (Nepal) and Gillian McAuliffe (Australia). Current facilitation or coordination is recorded as World Forum Foundation, through its Nature Action Collaborative for Children / nature working-group network.
Is International Mud Day international or country-specific?
The documented scope is international or global: international early-childhood nature-play observance. That does not mean every country treats the date as a public holiday or observes it in the same way.
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 2026-09-05.
When is International Mud Day?
It is observed on 29 June.
Who started International Mud Day?
World Forum Foundation traces the idea to a 2009 conversation between Bishnu Bhatta of Nepal and Gillian McAuliffe of Australia within the Nature Action Collaborative for Children.
When was the first International Mud Day?
World Forum Foundation identifies 29 June 2011 as the first International Mud Day.
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International Day of the Tropics
A/RES/70/267
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