user: Question: When was the game played in Zagreb?
Columns: ['Date', 'City', 'Opponent', 'Results¹', 'Type of game']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['April 5', 'Athens , Greece', 'Greece', '4:1', 'Friendly']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "City" = 'Zagreb';