International Day of Sign Languages 2025: Date, Theme, Significance

Each year on September 23, the world observes the International Day of Sign Languages (IDSL) to promote the importance of sign languages for the deaf and hard of hearing community, and to celebrate linguistic and cultural diversity. In 2025, the observance continues to emphasize inclusive communication with the theme: “Sign Language Unites Us”, underlining how sign languages bridge gaps and foster belonging in diverse societies.

Recognized by the United Nations, IDSL is especially relevant to students and educators seeking to understand issues of accessibility, inclusion, and the right to language.

Theme of International Day of Sign Languages 2025

The 2025 theme, “Sign Language Unites Us”, focuses on the power of sign languages to break communication barriers and bring people together, regardless of their hearing ability, background, or identity. It calls for greater understanding, respect, and support for sign languages in public spaces, education, technology, and daily life.

The theme encourages young people to view sign language not just as a tool for communication but as a language of empathy, identity, and inclusion.

Historical Background

• The International Day of Sign Languages was first celebrated in 2018, following a UN resolution adopted by the United Nations General Assembly.
• It falls during International Week of the Deaf, and is spearheaded by the World Federation of the Deaf (WFD).
• September 23 was chosen to commemorate the establishment of the WFD in 1951, a global organization that advocates for deaf rights worldwide.

Why This Day Matters

Empowering the Deaf Community

Sign languages are essential for the expression of identity, education, and participation of deaf individuals in society. They,

• Enable access to information and services
• Protect the human right to communication
• Facilitate inclusion in schools, workplaces, and civic life

Promoting Linguistic Diversity

• There are over 300 different sign languages around the world.
• Each sign language has its own grammar, syntax, and vocabulary, completely independent from spoken languages.
• Examples include American Sign Language (ASL), British Sign Language (BSL), and Indian Sign Language (ISL).

How to Celebrate and Raise Awareness

Activities for Students and Schools

• Attend a workshop or basic sign language class (online or in person).
• Learn to sign your name or common greetings in your national sign language.
• Host a guest session with a deaf speaker or interpreter.
• Design posters or videos explaining the 2025 theme.
• Screen a film that features sign language or deaf actors followed by a discussion.
• Organize a school campaign promoting accessibility and inclusion.

Social Media Engagement

• Use the hashtag #SignLanguageUnitesUs to join global conversations.
• Share inspiring quotes, infographics, or personal learnings.
• Encourage student clubs to participate in online awareness drives.

Fun Facts About Sign Languages

• Facial expressions and body movements play a vital role in conveying tone and meaning.
• Many deaf individuals are bilingual, using both sign and written/spoken language.
• Learning sign language can improve memory, visual-spatial skills, and empathy.

Key Takeaways

• Date: 23rd September 2025
• Theme: Sign Language Unites Us
• Organised by: United Nations and World Federation of the Deaf
• Objective: Promote linguistic equality, deaf rights, and inclusive communication
• Importance: Encourages empathy, advocacy, and inclusive education