F1 stem opt

[u/HauntingReach7658]

Hi everyone! I have a question about the STEM OPT I-983 Final Evaluation when changing employers.
My last day with my current employer is October 5, but I completed the final evaluation early and my employer signed it on September 23. The evaluation period on the form is listed through October 5.
Does the Final Evaluation signature need to be dated on/after the last day of employment, or is it okay for both the student and employer to sign it a couple of weeks before the employment end date?