user: Question: What is Date, when Championship is Mackay?
Columns: ['Outcome', 'Date', 'Championship', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', '3 June 2001', 'Durban 1', 'Hard', 'Lara Van Looyen', '4–6, 6–3, 7–6(3)']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Championship" = 'Mackay';