user: Question: When was the McDonald's LPGA Championship?
Columns: ['No.', 'Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up', 'Winners share ( $ )']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '8 Jun 2008', "McDonald's LPGA Championship", '73-70-65-68=276', '−12', 'Playoff', 'Maria Hjorth', 300000.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Tournament" = 'McDonald''s LPGA Championship';