African-American Scientist and Inventor Day is not a widely recognized or official national holiday in the United States, and as such, there isn't a set date or established traditions associated with this day. However, it may be observed by various schools, organizations, and communities to celebrate the contributions of African-American scientists and inventors throughout history.

The day would typically involve educational programs, such as workshops, seminars, and presentations that highlight the achievements of notable African-American figures in the fields of science, technology, engineering, and mathematics (STEM). These events aim to inspire young people and promote diversity within STEM disciplines.

Activities might include:

• Lectures or Stories: Sharing the stories of groundbreaking African-American scientists like George Washington Carver, Mae Jemison, Percy Julian, Katherine Johnson, or contemporary figures such as Neil deGrasse Tyson.
• Classroom Activities: Teachers may plan lessons or projects that focus on the inventions and discoveries made by African-American scientists.
• Community Events: Local institutions like libraries or museums may host events or exhibits showcasing contributions of African-Americans to science and technology.
• Social Media Campaigns: Individuals and organizations might use social media platforms to spread awareness about influential African-American scientists and inventors by sharing facts or quotes.

The objective is to educate the public about the past struggles for recognition faced by African-American scientists due to racial discrimination and to foster an environment where future generations can pursue careers in STEM free from such barriers.