Question: When did the financial crisis start in 2008?
Disambiguated questions and answers: question: On what date did the financial crisis of 2008 actually start happening?
Upon what 2007 event did the financial crisis of 2008 start happening?
On what date did the financial crisis in 2008 start developing into a full-blown international banking crisis?
Upon what event did the financial crisis in 2008 start developing into a full-blown international banking crisis?
answer: April 2007
depreciation in the subprime mortgage market
September 15, 2008
collapse of the investment bank Lehman Brothers
Natural Questions answer: beginning in August 2006 (from the Wikipedia article "Financial crisis of 2007–2008")