World Day for Animals in Laboratories2026 · Date · History · Messages
The campaign’s official history identifies 24 April and traces the observance to 1979; NAVS also marks the date in current advocacy material.
About World Day for Animals in Laboratories
World Day for Animals in Laboratories is observed on April 24 as an international advocacy day focused on animals used in research and on alternatives to animal experimentation.
The campaign’s official history says the National Anti-Vivisection Society in the United Kingdom founded the observance in 1979.
Why World Day for Animals in Laboratories matters
The observance is used by animal-protection organizations to discuss laboratory-animal welfare, regulation and the development of non-animal research methods.
Because policy and scientific claims in this area can be contested, specific factual claims should be tied to current scientific or regulatory sources.
History of World Day for Animals in Laboratories
The official World Day for Laboratory Animals history identifies 1979 as the founding year and credits the UK National Anti-Vivisection Society.
April 24 remains the recurring annual date, with related campaign activity sometimes extending across a wider Lab Animal Week.
Animal Defenders International, the Lord Dowding Fund and NAVS are described in the campaign history as organizations involved in work concerning replacement of animal experiments.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
National Anti-Vivisection Society (NAVS), United Kingdom
The official campaign history explicitly says World Day for Laboratory Animals was founded in 1979 by NAVS.
National Anti-Vivisection Society (NAVS)
NAVS World Day for Laboratory Animals campaign institution
First documented observance
The official history identifies 1979 as the start year, but does not provide a more precise inaugural-event date.
Animal Defenders International (ADI), with campaign partners including NAVS
The official campaign history identifies ADI, the Lord Dowding Fund and NAVS as organizations working on the campaign’s subject area, with the current campaign site maintained in that network.
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.
3 fields not established in reviewed sources
How to Observe World Day for Animals in Laboratories
Read current regulatory and scientific material about laboratory-animal use and alternatives.
Support transparent, evidence-based discussion about research methods and animal welfare.
Learn how replacement, reduction and refinement approaches are applied in research governance.
When sharing statistics, cite a current source and distinguish advocacy claims from official regulatory data.
World Day for Animals in Laboratories Facts
World Day for Animals in Laboratories is observed on April 24.
Its official campaign history credits the National Anti-Vivisection Society with founding it in 1979.
The campaign is also associated with Lab Animal Week.
Current campaign material emphasizes alternatives to animal testing.
The reviewed sources do not establish an exact first-event date within 1979 or a verified reason that April 24 was selected.
World Day for Animals in Laboratories Messages
On World Day for Animals in Laboratories, may discussion stay informed, humane and grounded in reliable evidence.
May today encourage careful learning about research methods, regulation and alternatives to animal experimentation.
World Day for Animals in Laboratories is a reminder to pair compassion with accurate, current evidence.
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.
NAVS — World Day for Animals in Laboratories (opens in a new tab)
First Party Organization
World Day for Laboratory Animals — About (opens in a new tab)
First Party Campaign
World Day for Laboratory Animals — campaign home (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 World Day for Animals in Laboratories?
24 April annually The documented recurrence rule is: 24 April.
Does World Day for Animals in Laboratories fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is World Day for Animals in Laboratories an official public holiday?
The reviewed sources verify it within this scope: International / animal-research advocacy 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 World Day for Animals in Laboratories?
The reviewed sources identify National Anti-Vivisection Society (NAVS) as the proclaiming or establishing body. The proposer or originator is recorded separately as National Anti-Vivisection Society (NAVS), United Kingdom. Current facilitation or coordination is recorded as Animal Defenders International (ADI), with campaign partners including NAVS.
Is World Day for Animals in Laboratories international or country-specific?
The documented scope is international or global: International / animal-research advocacy 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 2026-09-08.
When is World Day for Animals in Laboratories?
It is observed annually on April 24.
Who founded World Day for Animals in Laboratories?
The campaign’s official history credits the UK National Anti-Vivisection Society with founding it in 1979.
What is the day about?
It is an advocacy observance focused on animals used in laboratories and on promoting non-animal research methods.
Other observances on April 24
These observances are also listed on April 24, 2027.
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A/RES/73/127
International Sculpture Day
International Sculpture Center states that it inaugurated International Sculpture Day in 2015 and that the observance occurs on the last Saturday of April every year.
National First Ladies Day
The National First Ladies Day Commission says the observance was founded in 2021 and schedules its annual celebration on the last Saturday in April.