I was reviewing my UC Server yesterday and noticed the time an hour off. Upon a deeper look, I saw that time was set to EST - which I take to mean Eastern Standard Time. Maybe it is. Maybe it is on Earth Two, but here on Earth One it was an hour off.
I dropped down the very long list and changed the time to United States Eastern Time. While that corrected the time, it unexpectedly (for me) brought the service to it's knees and all UC Services stopped and I got about 12 email alerts from the server. Users started complaining about strange messages about their UCA. The server-manager indicated that there was no longer an enterprise (which was scary to me, but I do a manual backup of the DB fairly often).
So, I did a server restart (as opposed to just a service restart) and everything went back to normal.
Not sure if this was normal behavior, but just an FYI for what it's worth.