Will my package get here before memorial day?

How does the shipper define "expedited shipping" Today is Thursday. Just because you ordered it today doesn't mean the order was filled today. Let's just say that your order is processed and packaged the same day you ordered it. So your package ships today, Thursday. If expedited shipping is defined as 2 days (generally it is) then you're package should arrive on Saturday. If it's coming via USPS then it will not be delivered on Sunday (closed) or Monday (holiday). So if it doesn't arrive on Saturday it won't make it by the holiday.

You have to know how the seller/shipper defines "expedited" shipping.

Maybe, but there isn't enough information. It isn't clear that your item is in stock and will be shipped immediately or what expedited shipping is for the company you're dealing with. If it's overnight or two day delivery, you might get it, but you shouldn't count on it.

Check w the carrier as this is the only way to know.