user: Question: What Date had a Series of ATCC Round 6?
Columns: ['Date', 'Series', 'Circuit', 'City / State', 'Winner', 'Team']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['30 Jan', 'Winfield Triple Challenge', 'Eastern Creek Raceway', 'Sydney , New South Wales', 'Glenn Seton', 'Glenn Seton Racing']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Series" = 'ATCC Round 6';