Give some stream of consciousness and then the answer. The next solar eclipse (Partial) will occur on February 15, 2018; the last solar eclipse (Total) occurred on August 21, 2017.

Answer this question: when was the last solar eclipse we had?
The important part for answering this question is: The next solar eclipse (Partial) will occur on February 15, 2018; the last solar eclipse (Total) occurred on August 21, 2017.
Therefore, the answer is August 21 , 2017.