On February 1:
Feb. 1, 1865 – The 13th Amendment to the U.S. Constitution, which abolished slavery, was adopted by the 38th Congress.
Feb. 1, 1902 – Langston Hughes, a famous poet, was born this day in Joplin, Mo.
Feb. 1, 1926 – What is now known as Black History Month was first celebrated on this date as Negro History Week by Carter G. Woodson. It became a month-long celebration in 1976.