Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
When was the game played against Astley Bridge 'a'?

### Inputs:
table_name: table, columns: ['Date', 'Opponents', 'H / A', 'Result F – A', 'Scorers']

### Response:
SELECT Date FROM table WHERE Opponents = astley bridge 'a'