user: Question: What date was the game held at UMBC field?
Columns: ['Date', 'Time', 'Opponent', 'Site', 'City']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['02/24/08', '2:00pm', 'UMBC', 'UMBC field', 'Catonsville, MD']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Site" = 'UMBC field';