Question: When was the 13th amendment ratified by the states?

context: The Thirteenth Amendment (Amendment XIII) to the United States Constitution abolished slavery and involuntary servitude, except as punishment for a crime. In Congress, it was passed by the Senate on April 8, 1864, and by the House on January 31, 1865. The amendment was ratified by the required number of states on December 6, 1865. On December 18, 1865, Secretary of State William H. Seward proclaimed its adoption. It was the first of the three Reconstruction Amendments adopted following the American Civil War.
question: When was the 13th amendment ratified by the required number of states?
short_answers: December 6, 1865
context: No context provided
question: When was the 13th amendment ratified by the first group of states?
short_answers: February 1865

Answer: The Thirteenth Amendment (Amendment XIII) to the United States Constitution abolished slavery and involuntary servitude, except as punishment for a crime. In Congress, it was passed by the Senate on April 8, 1864, and by the House on January 31, 1865. By the end of February 1865, 18 states had ratified the amendment. At least 27 states had to ratify the amendment for it to come into force, and by December 6, 1865, the amendment was ratified by the required number of states.