Stats skipping days completely??

[MusicMan]

I was looking at my site's stats and I noticed that for some reason February 14th is missing from all of the stats pages ACP -> Statistics -> (registrations, active users, new posts, new threads, etc...). It's as if we didn't even exist that day. Any reason this is happening? It's not because of the "include empty results" or whatever, I don't have any empty results anywhere that would make it not show. So hopefully someone can help find the root of this problem.

Also worth noting, I remember viewing the stats on the 14th and the bottom two dates both showed as Feb.13th, instead of the 13th and 14th. Also, I don't want to rebuild statistics because I'm not sure what damage it could cause to the database and what might be lost.

Thanks for any help you can provide.