I have an owncloud server that I am using for contacts sync (cardav), but I haven't been able to set it up for caldav. I think I have tried every single combination between servername and calendar paths https://together.jolla.com/question/...with-owncloud/

I think I will come back in a few days/weeks (depending on work) and try again before showing errors or looking for help.

Nevertheless, this post is for telling how to set up a yandex calendar account the calendar export looks something like https://caldav.yandex.ru/calendars/u...vents-anumber/ where anumber is a number (you get it in calendar web page clicking on export and caldav) and username the username of mail account:

username: your username without @yandex.com/ru
password: your password

hostname: https://caldav.yandex.ru/

Cardav inactive:
Caldav active with path:
calendars/username@yandex.com/events-anumber/

I was trying to write the %40 instead of @ as I did in icedove/thunderbird and it was getting converted into %2540 and failing until I arrive to that. Just in case someone can not make work his/her owncloud calendar and does not want to use (or to only use) google calendar.