When is the earliest a student can apply for the STEM OPT Extension?
90 days prior to the end date of their current OPT.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
When is the earliest a student can apply for the STEM OPT Extension?

### Input: Not applicable

### Response:
90 days prior to the end date of their current OPT.<|im_end|>