Box office / will call question

So for my theater trip in August I have selected to pick up all of my tickets will call at the box office. Here is my question: Do I have to pick up the tickets the day of each performance? Or can I drop by each box office anytime before the performance at my convenience to pick up the tickets?

For example, if I arrive to NYC on Tuesday but am not seeing Harry Potter until Saturday, could I pick up my tickets at the box office on, say, the Friday in between.

Sorry if this is a dumb question but I appreciate anyone who could give me some direction.

I agree with what the other commenters have said.

When I pickup the tickets the day of performance, the tickets are already printed and put inside an envelope. If I'm picking up tickets for a performance that is more than a week away, the box office would ask for my ticket order number and then print out the tickets right then and there and put them inside an envelope.