Hey, guys. I think that on December 2nd, almost every single person got their call on that day. Maybe a
few people got calls the next day, but I think those were flukes that probably weren't supposed to happen. Since they won't have as many calls to make after January acceptances, I really hope you will all get them on the same day and that none of you will be kept waiting!
That's an interesting theory about the UNC "pin" number. Do you mean PID? I'm sure you're going to have a few people scrambling to the site, so it'd be nice to know exactly what you're talking about.
If it is the PID you're talking about, here's the lookup link if anyone is curious:
https://itsapps.unc.edu/PIDCreate/jsp/wmp.jsp
No idea if that theory actually pans out, though.