It happens that when I left click with the mouse on the right side panel, where is the day and time, with the default settings, the calendar that is displayed is frozen and there is no way to save/disappear it.
I try to do it with alt+q but I can’t get it to save or disappear and I have to reboot so that it doesn’t reappear on the desktop.
Maybe this is already solved and I haven’t seen it posted.
Using the esc key or alt+q should close the calendar as long as the calendar still has focus (both working on my system).
If you moved the mouse and given a different window focus (focus_mouse = true is the default setting); or given focus to another window by some other means, neither will work. You will need to give the calendar window focus again in order to close it.
If you can’t close the calendar when the calendar window has focus, then there is a bug that needs to be tacked down.