I want to know the answer to the following question:
When did Gorbachev resign?
All the background I'm provided with is that "In a nationally televised speech early in the morning of December 25, 1991, Gorbachev resigned as president of the USSR – or, as he put it, "I hereby discontinue my activities at the post of President of the Union of Soviet Socialist Republics."". Is that enough to answer the question?