I am in a grace period (60 days after OPT expires). It expires on February end.

I have an I20 issued from one of the University. However, the classes start on June 1st week.

What is the time I have to begin classes after the end of grace period? Do you think this would be legal.

 I believe there is a certain time from USCIS for you to begin classes as soon as your Grace Period ends.

Anyone can please help me