National Diatomaceous Earth Day2026 · Date · History · Messages
EP Minerals states that it founded National Diatomaceous Earth Day, that National Day Calendar approved the day in 2016, and that the observance is on August 31.
About National Diatomaceous Earth Day
National Diatomaceous Earth Day is observed on August 31 as an informal educational observance founded by EP Minerals in 2016.
The day focuses on diatoms and diatomaceous earth, a naturally occurring material used in industrial and commercial applications such as filtration, absorbents and other products.
Why National Diatomaceous Earth Day matters
The observance offers a reason to learn how microscopic diatoms contribute to deposits of diatomaceous earth and how the material is used in different industries.
Learning about a material is different from assuming every product or use is safe: handling instructions depend on the product, formulation and intended application.
History of National Diatomaceous Earth Day
EP Minerals published an announcement on August 30, 2016 stating that it founded National Diatomaceous Earth Day and that National Day Calendar had approved the day in 2016.
That announcement invited people to be among the first to celebrate on August 31, supporting August 31, 2016 as the first documented edition.
National Day Calendar’s proclamation material likewise identifies EP Minerals as the founder and records the 2016 approval.
Later EP Minerals material continues to mark National Diatomaceous Earth Day on August 31.
The cited material establishes the founder, first edition and recurring date, but it does not explain why August 31 specifically was selected or establish a government holiday.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
EP Minerals
EP Minerals states directly that it founded National Diatomaceous Earth Day.
EP Minerals, with National Day Calendar registrar approval
EP Minerals National Diatomaceous Earth Day launch announcement
First documented observance
The creator announcement says readers can be among the first to celebrate the newly approved day on August 31, supporting August 31, 2016 as the first documented edition.
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.
4 fields not established in reviewed sources
Also known as
National Diatomaceous Earth Day, National Diatomaceous (DE) Day
How to Observe National Diatomaceous Earth Day
Learn about diatoms and diatomaceous earth through geology, microscopy, museum or educational resources.
If you encounter a commercial diatomaceous-earth product, follow the product label and manufacturer or regulator instructions for its specific intended use.
Avoid creating or breathing airborne dust and use appropriate exposure controls described on the product label or safety documentation.
Do not ingest diatomaceous earth or use it as a medical treatment based on observance-day content.
For pesticide products, follow the legally required label directions and applicable regulator guidance rather than improvising a use or concentration.
National Diatomaceous Earth Day Facts
National Diatomaceous Earth Day is observed on August 31.
EP Minerals states that it founded the observance in 2016.
August 31, 2016 is supported as the first documented edition.
National Day Calendar records registrar approval in 2016.
The observance does not establish that diatomaceous earth is safe for ingestion, medical use, uncontrolled inhalation exposure or unlabelled pesticide use.
National Diatomaceous Earth Day Messages
Happy National Diatomaceous Earth Day—here’s to learning how tiny diatoms connect geology, materials science and everyday products.
Celebrating August 31 with curiosity about diatoms, earth science and the many industrial uses of diatomaceous earth.
Wishing you an informative National Diatomaceous Earth Day filled with careful science and responsible product handling.
Here’s to National Diatomaceous Earth Day—learn the material, read the label and keep safety ahead of experimentation.
Happy National Diatomaceous Earth Day—may the day spark curiosity about microscopic life and the remarkable materials it leaves behind.
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.
EP Minerals — celebrates National Diatomaceous Earth Day on August 31 (opens in a new tab)
Creator First Party
EP Minerals — National Diatomaceous Earth Day is August 31 (opens in a new tab)
Creator First Party Recurrence
National Day Calendar — National Diatomaceous Earth Day proclamation (opens in a new tab)
Observance Registrar
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 National Diatomaceous Earth Day?
31 August The documented recurrence rule is: 31 August each year under the EP Minerals-created observance..
Does National Diatomaceous Earth Day fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is National Diatomaceous Earth Day an official public holiday?
The reviewed sources verify it within this scope: United States / EP Minerals-created diatomaceous-earth 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 National Diatomaceous Earth Day?
The reviewed sources identify EP Minerals, with National Day Calendar registrar approval as the proclaiming or establishing body. The proposer or originator is recorded separately as EP Minerals.
Is National Diatomaceous Earth Day international or country-specific?
This observance is specific to United States. Its fuller verified scope is: United States / EP Minerals-created diatomaceous-earth observance.
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 2026-09-21.
When is National Diatomaceous Earth Day?
It is observed on August 31 each year.
Who created National Diatomaceous Earth Day?
EP Minerals states that it founded the observance in 2016.
When was it first observed?
EP Minerals’ August 30, 2016 launch invited people to be among the first to celebrate on August 31, supporting August 31, 2016 as the first documented edition.
Is diatomaceous earth safe to ingest?
This observance guide does not recommend ingestion or medical use. Follow product labels and qualified health or regulatory guidance for any exposure question.
Can any diatomaceous earth be used as a pesticide?
No assumption should be made from the material name alone. Use pesticide products only for labelled uses and follow the product’s legally required directions and regulator guidance.
Other observances on August 31
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International Day for People of African Descent
A/RES/75/170
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Trinidad and Tobago Independence Day
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