user: Question: Name the date for  L 28–15 
Columns: ['Week', 'Date', 'Opponent', 'Location', 'Final Score', 'Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'August 19', '@ Rough Riders', 'Landsdowne Park', 'L 44–7', 18470.0, '0–1–0']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Final Score" = 'L 28–15';