What Is International Stuttering Awareness Day? Every year on October 22 , people around the world come together to recognize International Stuttering Awareness Day (ISAD) — a time dedicated to raising awareness, challenging misconceptions, and celebrating the voices of people who stutter. Stuttering, also known as stammering , is a speech fluency disorder that affects the flow of speech. A person who stutters may repeat sounds or words, stretch out sounds, or experience pa