There is no specific holiday or event known as "International Day in Black history." However, Black History Month is celebrated in the United States and Canada in February, and in the UK in October. It is a time to recognize and honor the achievements and contributions of Black people throughout history. The idea is to promote awareness of Black history and to educate people about the important role that Black individuals have played in shaping our world. It is a time for reflection and celebration of the rich cultural heritage of Black communities around the world.