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

### Instruction:
What day did the platform sell 9.87 million units?

### Inputs:
table_name: table, columns: ['Rank', 'Title', 'Release Date', 'Franchise', 'Developer(s)', 'Platform', 'Units sold (in Millions)']

### Response:
SELECT Release Date FROM table WHERE Units sold (in Millions) = 9.87