I reproduced the behaviour on another machine. I made a patch. Sorry, for the open problem.

@Dania5583 Please, if you think this is not solved, leave some details when re-opening. It is working perfectly fine with libtorrent 1.2.X

@raster as far as I can tell, it is fixed.

@CHAN Sorry for the absence. I looked at the code again. I understand you know.
If I am not mistaken, we have no information on when the weekend starts in the Elm_Calendar_Data structure.
Perhaps I could add something like that:

In D11874#228286, @CHAN wrote:

Im not sure we can remove _text_day_color_update...

It is different in the country to define the weekend.
There is no signal matching on the weekend.

I messed up with code convetion. Again.

Rspect codeconvetion.

@Hermet Thanks for looking into this.
I can use my machine as another testbed for it when you have started working on enventor.

A possible patch is here: https://github.com/rafspiny/enlightenment-live/blob/development/dev-util/enventor/files/enventor_eo_prefix_fix.patch
I am using it as a temporary solution.