While many people didn't notice it, the pokerstove website has been shut down for quite a while. While there are other tools out there, it is for many long time players the tool to do analysis on hand situations. As has happened in the past, the latest version of pokerstove had a switch in it to shut down by a certain date, which is 1/1/14 for this version.
I have seen nothing that shows the authors are going to update it.
That leaves the option of finding a new tool to use (I know they are out there) or resetting your clock to 2003 (the last time Jan 1 was on a Wednesday).
If people are using other tools, let us know your experience.