Incorrect shipping date on shipping label?

I sold something on eBay and I created a shipping label for it. However, when I created the shipping label I forgot to edit when I was going to ship. The label says I'm shipping 5/15 (today) but I can't ship today so I'm shipping tomorrow 5/16. Will they accept my package with an incorrect shipping label? I wanted to create a new one but I'd have to pay another $6 so I'd be losing money from my sale. I thought about voiding the label, but will that cancel the purchase? I wanted to contact eBay but they only have the option to call them, which I don't want to do.