1. The Story Behind the Day
A global day proposed by the Deaf movement
The origin of the day matters because it reflects Deaf leadership. The UN General Assembly adopted Resolution A/RES/72/161 on 19 December 2017, designating 23 September as the International Day of Sign Languages. According to both the UN and the World Federation of the Deaf, the proposal came from WFD and was advanced through the Permanent Mission of Antigua and Barbuda.
The date is not arbitrary. WFD was established on 23 September 1951, and the annual observance therefore connects contemporary language-rights advocacy with the history of international Deaf organising.
The first day was marked in 2018 alongside the International Week of the Deaf. That relationship continues to matter: the day sits within a wider movement led by Deaf people rather than being a generic disability-awareness event.
Sign languages are languages
One of the most important facts the day communicates is also one of the simplest: sign languages are fully fledged natural languages. They have their own grammar and structure and are not merely spoken languages converted word for word into gestures.
There are many national and regional sign languages. British Sign Language is not the same language as American Sign Language; different countries and communities have their own linguistic histories. International Sign can support some international communication, but it does not replace national sign languages.
That linguistic diversity is part of culture as well as access.
Language rights are human rights
The UN observance connects sign language directly to human rights. The Convention on the Rights of Persons with Disabilities defines language to include spoken and signed languages and recognises multiple accessible modes of communication.
For Deaf people, access to sign language can shape education, family communication, public services, healthcare, political participation and cultural life. When sign language is treated as an optional extra rather than a language right, exclusion can begin very early.
Deaf identity is not reducible to hearing loss
Medical descriptions of hearing can be useful in healthcare, but they do not capture Deaf culture or linguistic identity. Some people use “Deaf” with a capital D to describe cultural and linguistic belonging; others use different language for themselves.
The International Day of Sign Languages is therefore not simply a day about an impairment. It is a day about languages, communities and the right to communicate.
2. What Can We Learn?
Access is more than interpretation at the last minute
Providing an interpreter can be essential, but language access starts before an event begins. Is the interpreter booked early enough? Are they qualified for the context? Can Deaf participants see the interpreter and presentation at the same time? Are videos captioned? Are online platforms configured so interpreters remain visible?
Good access is planned as part of the event rather than added after a Deaf person asks.
Families need information about language, not only treatment
When a child is identified as deaf or hard of hearing, families may encounter medical information first. They also need timely, unbiased information about communication and language options, including sign languages.
The UN resolution emphasises early access to sign language and services in sign language. That emphasis reflects a basic developmental principle: children need accessible language. Decisions about technology and healthcare do not remove the need to think seriously about language access.
Communication preference belongs to the person
Not every deaf or hard-of-hearing person signs. Some use spoken language, captions, hearing technology, lip-reading, sign language or combinations. Deafblind people may use tactile forms of sign and other communication methods.
Inclusion improves when organisations ask rather than assume. “What communication access do you need?” is more useful than deciding in advance that one method fits everyone.
Language carries culture
Languages are not interchangeable delivery systems. They carry humour, storytelling, history, community norms and identity. Losing access to a language can therefore mean losing access to culture and relationships, not only information.
Celebrating sign languages means valuing the communities that sustain them.
3. What Needs to Change?
Sign-language access must be funded as core access
Interpreting is sometimes treated as an exceptional expense charged against the participation of one Deaf person. That framing creates incentives to avoid access or to make individuals feel costly.
Organisations should build communication access into budgets, procurement and event planning. Public services in particular need predictable systems rather than improvised arrangements.
Public information needs multiple accessible routes
The CRPD's Article 21 calls for accessible formats and recognises sign languages and other communication modes. In practice, that means important information should not exist only as dense written text or spoken announcements.
Signed information, captions, plain language and accessible digital formats can serve different users. One format does not replace all others.
Deaf people should shape Deaf policy
Policies about sign-language services, education or interpreting should not be designed without Deaf leadership. Technical experts can contribute, but lived linguistic experience is not an optional consultation layer.
The principle “nothing about us without us” is especially relevant when the subject is language itself.
Stop treating interpreters as participants' voices
An interpreter facilitates communication; they are not the Deaf person's representative. Meetings can become awkward when hearing participants direct questions to the interpreter instead of the Deaf participant.
Basic etiquette matters: speak to the person you are communicating with. The interpreter is part of the access arrangement, not the relationship.
Digital systems must work visually
Video conferencing has expanded access in some situations and created new barriers in others. Small video windows, poor contrast, automatic speaker switching and inaccessible recordings can make signed communication difficult.
Platforms and organisers should test the actual visual experience for signing users, not assume that “video available” means accessible.
Education policy has lifelong consequences
Language access in childhood affects far more than classroom participation. When children can communicate fully with teachers, peers and family, they have better opportunities to build knowledge, relationships and self-advocacy. When language is delayed or inaccessible, the consequences can follow a person into later education and public life.
This is why the UN day emphasises early access rather than treating sign-language provision as a service that can wait until adulthood. Families need timely information from Deaf-led and professional sources so they can make informed choices.
Captions and sign-language interpretation serve different needs
It can be tempting to treat captions as a universal replacement for sign-language interpretation because both make spoken content more accessible. They do not serve identical functions. A Deaf sign-language user's strongest language may be a sign language, while captions remain written language.
Accessible events should choose formats based on actual participants and context. In many cases, providing both captions and interpretation increases access for different people.
Language recognition should reach everyday services
A language can be celebrated symbolically while still being difficult to use in healthcare, courts, education or emergency information. The real test of recognition is whether people can communicate in high-stakes situations without unreasonable delay or dependence on relatives.
Public bodies can map where interpreting and signed information are routinely available, where waiting times create barriers and whether staff know how to book qualified support. A rights statement becomes meaningful when it changes those ordinary systems.
Signed content should be created, not merely translated at the last second
A recorded message interpreted after production may technically add access, but signed communication can work better when it is considered during filming, layout and pacing. Camera framing, visual contrast, on-screen text and speaker changes all affect comprehension.
Organisations producing recurring public information can build sign-language workflows into content planning rather than commissioning emergency interpretation after everything else is finished. This also makes quality review with Deaf users more realistic.
4. What Can You Do?
Take Part — Use and celebrate the sign language of your community
If you are a Deaf signer or part of a signing community, mark the day in whatever way is meaningful: join a Deaf-led event, share work by Deaf creators, teach others about your language, or simply enjoy using it with people who share it. There is no obligation to become an educator for hearing audiences.
Show Your Support — Learn from Deaf-led sources and respect linguistic diversity
Do not talk about “sign language” as though there were one universal system. Find the relevant national or regional Deaf organisations, learn which sign language is used locally, and support qualified interpreters and Deaf-led teaching rather than improvised substitutes.
For Organisations — Build sign-language access in before people ask
Budget and book interpretation early where appropriate, publish access information before registration opens, keep interpreters visually prominent online and on stage, and review at least one important information route so a Deaf sign-language user is not forced to rely on a relative to access essential information.
5. Explore the Movement
The United Nations International Day of Sign Languages page documents the 2017 resolution, the 23 September date, the WFD proposal and the first 2018 celebration. The World Federation of the Deaf's 2017 press release provides the movement's own account of achieving the UN designation.
The CRPD definitions are also useful because they formally recognise signed languages and multiple modes of communication in an international disability-rights framework.
Related Calendar 5.0 observances include International Week of the Deaf, World Hearing Day, International Day of Deafblindness, International AAC Awareness Month, World Braille Day and International Day of Persons with Disabilities. These should be linked carefully: Deaf culture and sign-language rights have their own history and should not be absorbed into generic accessibility language.
Go to the people behind the work
Start with United Nations · observance information. Follow their own information and work; this source does not confirm a 2027 programme.
Explore this source ↗More information & organisations
Follow the original initiative wherever it can be identified. The research reference remains available for transparency.
Specific official day page available · 2027 programme unconfirmed
6. Why This Day Matters to the Neurodiversity Foundation
The International Day of Sign Languages matters to NDF because neuroinclusion depends on respecting communication difference without ranking one mode as more human, intelligent or legitimate than another.
That principle extends beyond sign languages. Some neurodivergent people communicate through speech, text, AAC, sign, gesture or combinations that change by context. The lesson from Deaf communities is not that all communication differences are the same. It is that access improves when the person's language or communication method is treated as valid rather than as a problem to overcome for someone else's convenience.
NDF should also be careful about boundaries. Sign languages belong to Deaf linguistic communities, and the Foundation should not present them as a neurodiversity invention or use Deaf history merely as an analogy. Respect begins with accurate attribution and with learning from Deaf-led organisations.
For our own practice, the day is a prompt to make meetings, events and information genuinely multimodal. Captions alone do not solve every need; sign-language interpretation alone does not solve every need either. Inclusion requires choices.
The strongest message is therefore simple: communication access is not generosity. It is part of equal participation, and the people who use a language should have power over the systems that determine whether they can use it.