The International Day of Sign Languages (IDSL) is observed every year on 23rd September, a date chosen by the United Nations to honour the founding of the World Federation of the Deaf (WFD) in 1951. Proclaimed by the UN General Assembly in December 2017, the day was first celebrated in 2018 and has since become a central event within the global International Week of Deaf People, which runs annually during the last week of September. The purpose of IDSL is to raise worldwide awareness that sign languages are fully independent, natural human languages, each with its own grammar, structure, and cultural heritage. It also highlights the rights of Deaf and hard‑of‑hearing people to access education, healthcare, public information, and civic participation through their national sign languages.
The day carries particular significance because it reinforces the principles of the UN Convention on the Rights of Persons with Disabilities (CRPD), adopted in 2006, which formally recognises national sign languages as equal to spoken languages. In 2026, IDSL aligns with two major milestones: 20 years since the CRPD’s adoption and 75 years of the WFD, making the year’s theme, “Declaring Deaf People’s Human Rights”, especially resonant. This theme emphasises that recognition alone is not enough; governments, institutions, and communities must ensure that Deaf people’s rights are implemented in everyday life. These rights include access to quality multilingual education in sign language, sign‑language‑based healthcare, and meaningful inclusion of Deaf-led organisations in policy decisions.
IDSL is also a celebration of Deaf culture, identity, and community, which have long been expressed through national sign languages. Around the world, Deaf associations organise events such as performances, exhibitions, seminars, film screenings, and public awareness campaigns. Global initiatives like “Shine a Blue Light on Sign Languages,” the Global Leaders Challenge, and the Global Deaf Flag Raising help bring visibility to sign languages and encourage governments to commit to stronger linguistic rights. These activities highlight the diversity of sign languages worldwide, more than 300 are used globally, and the cultural richness embedded within each one.
In the United Kingdom, the day has particular relevance due to the growing recognition of British Sign Language (BSL). The British Deaf Association estimates that 87,000 Deaf people use BSL as their first or preferred language, with around 151,000 total users nationwide. Despite this, access to qualified interpreters remains limited, with only one registered interpreter for every 60 Deaf BSL users, affecting access to healthcare, legal services, employment, and public life. A major milestone came in July 2022, when the British Sign Language Act received Royal Assent, officially recognising BSL as a language of Great Britain. IDSL provides an annual platform to promote continued implementation of the Act and to advocate for improved access and inclusion across UK institutions.
Across the world, the International Day of Sign Languages serves as both a celebration and a call to action. It reminds societies that linguistic rights are human rights, and that national sign languages must be protected, promoted, and used in all areas of public life. By honouring Deaf culture and reaffirming commitments to accessibility and equality, IDSL strengthens global understanding of sign languages as vital components of human diversity. As the movement continues to grow, the day stands as a powerful symbol of unity, bringing together Deaf communities, allies, educators, and policymakers to ensure that sign languages flourish for generations to come.
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