user: Question: Which date has a To par of –12?
Columns: ['Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1 Sep 2003', 'Deutsche Bank Championship', '69-62-67-66=264', '–20', '4 strokes']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "To par" = '–12';