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

### Instruction:
What date did the Fai Cup with Derry City F.C. as runners-up take place?

### Inputs:
table_name: table, columns: ['Date', 'Competition', 'Winners', 'Score', 'Runners-up']

### Response:
SELECT Date FROM table WHERE Competition = fai cup AND Runners-up = derry city f.c.