I just received a HUGE bone-in, spiral cut ham from Niman Ranch. I emailed Niman and unless they're working 7x24, they haven't had a chance to answer yet. I'm being holiday obsessive compulsive, so I figured I'd go for backup and ask the wizards here. It's about 18 lbs. How do I defrost this beast? In the fridge? For how long? Serving it this Saturday 12/20. It's already cooked. I suppose it might be nice to warm it up with more glaze, but I would have to do that the day before, not day of. As you can tell, I don't know a heck of a lot about hams. Except to keep the ham bone for stock.