u/Civil-Cap237

I am an international student graduating soon and have work lined up. My employer has asked me for a start date but I can't provide them until I have applied for my PGWP which is conditioned on when I get my final grades (at which point I can apply for a letter of completion). What is a good start date to provide them so they can go ahead with the creation of a contract I may sign. They want me to start ASAP.