As a Harvard-trained historian, Carter G. Woodson, like W. E. B. Du Bois before him, believed that truth could not be denied and that reason would prevail over prejudice. His hopes to raise awareness of African American’s contributions to civilization was realized when he and the organization he founded, the Association for the Study of Negro Life and History (ASNLH), conceived and announced Negro History Week in 1925. The event was first celebrated during a week in February 1926 that encompassed the birthdays of both Abraham Lincoln and Frederick Douglass. The response was overwhelming: Black history clubs sprang up; teachers demanded materials to instruct their pupils; and progressive whites, not simply white scholars and philanthropists, stepped forward to endorse the effort.
By the time of Woodson’s death in 1950, Negro History Week had become a central part of African American life and substantial progress had been made in bringing more Americans to appreciate the celebration. At mid–century, mayors of cities nationwide issued proclamations noting Negro History Week. The Black Awakening of the 1960s dramatically expanded the consciousness of African Americans about the importance of black history, and the Civil Rights movement focused Americans of all color on the subject of the contributions of African Americans to our history and culture.
Source: https://africanamericanhistorymonth.gov/about/