When should I apply for on-campus jobs

I move into Brandywine Campus on the 23rd and I’ve heard that I can apply for part time work at the dining halls like the Blue Apple Cafe to make some money and save a good bit on meals.

However I don’t know when an optimal time to apply would be.

When should I apply for the job, would it be best to apply on move-in day? On the weekend after I move in? Or would another time be best.