International Day of Sign Languages
International Day of Sign Languages is held on September 23. Adopted by the UN on November 14, 2017. This event in the third decade of the month September is annual. 
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Sign language isn't as difficult to learn as it looks. American Sign Language (ASL) is the most widely-used sign language around the world. In addition to individual differences in expression, ASL has regional accents and dialects; just as certain English words are spoken differently in different parts of the country, ASL has regional variations in the rhythm of signing, pronunciation, slang, and signs used.
The first person credited with the creation of a formal sign language for the hearing impaired was Pedro Ponce de León, a 16th-century Spanish Benedictine monk. His idea to use sign language was not a completely new idea.
On 19 December 2017, the UN General Assembly declared 23 September as International Day of Sign Languages (IDSL). The UN General Assembly has proclaimed 23 September as the International Day of Sign Languages in order to raise awareness of the importance of sign language in the full realization of the human rights of people who are deaf. The first International Day of Sign Languages was celebrated on 23 September 2018 as part of the International Week of the Deaf, that took place during on 24-30 September 2018.
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World Retina Day on September 24 (Held on the last Sunday in September);
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