user: Question: What date has the format of CD?
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Japan', 'November 21, 1980', 'Alfa Records', 'stereo LP', 'ALR-28007']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Format" = 'CD';