First 2 posts merged as it appears to be a common issue.
I thought the time was set by the network and I was going to ask which network you are all on, but that's irrelevant if Amerie is Voda and Robthedude is O2.
What apps have you installed/updated over the last few days? Are you all on 2.3.3?
According to this
post it corrected itself (no idea if accessing facebook was the cause).