Can it be done? I don't want to use Evolution's calendar... I want to keep using Thunderbird... I have to add some addons (like lightning) first right?
My goal is to have some calendar-like on thunderbird and replace the one of Evolution.
Go to System->Preferences->Preferred Applications.
On the first tab, change the Mail Reader settings.
If you don't have your email client in the drop down menu. You got to specify it manually in the Command field. For example,
It does not seem to actually solve the problem, although it should. Perhaps it's a bug. The second answer is actually working.
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OK, I found how to do this at How to change gnome-shell calendar default application
Just execute this in a terminal!!
I have tested it and it works!! (it's not exaclty what I wanted but it's a start)
The easiest thing to do is the following:
That creates a symbolic link that mapps the application call "evolution" to "thunderbird".
Because the Gnome Calendar Extensions starts