Q: In this task, you are given a context tweet and an answer. Your job is to generate a question for the given answer based on the given tweet paragraph. Note that your question should be answerable based on the given tweet, and the answer to your question should be the given answer.
Context: Partial solar eclipse at sunset! The moon will pass in front of the sun Thursday: [video] NASA (@NASA) October 20, 2014 Answer: sunset on thursday
A:
when is the partial solar eclipse?