International Day of Sign Languages is observed worldwide every September 23 during the International Week of the Deaf. Established by a UN General Assembly resolution in 2017 and first celebrated in 2018, this day commemorates the foundation anniversary of the World Federation of the Deaf (WFD), which was founded in 1951 to promote the human rights of deaf individuals globally. The main focus of the observance is to highlight the importance of sign languages for the realization of these rights, with over 70 million deaf people using more than 300 different sign languages for communication. It is emphasized that sign languages are independent natural languages, each with its own grammar and lexicon, such as British Sign Language and American Sign Language, which are not mutually intelligible. The day aims to improve the status of sign languages and advocate for early access to quality education and services in these languages for deaf individuals.