Are you running The classic gnome session or a Unity session. In case of latter I think bug should be filed against the package "Unity" as the top panel in Unity is "unity-panel" and is different from the classic one.
Also I could not reproduce the bug with Unity-panel in a fresh install of Ubuntu. ** Changed in: gnome-panel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/760523 Title: clock-applet: clicking on a calendar date opens the same number one monther earlier in Evolution -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs