user: Question: What is the date that Stirling Moss had his fastest lap in a Maserati?
Columns: ['Race', 'Circuit', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Constructor', 'Tyre', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Argentine Grand Prix', 'Buenos Aires', '22 January', 'Juan Manuel Fangio', 'Juan Manuel Fangio', 'Luigi Musso Juan Manuel Fangio', 'Ferrari', 'E', 'Report']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Constructor" = 'Maserati' AND "Fastest lap" = 'Stirling Moss';