I'm struggling to find a Linux calendar that feels reliable. GNOME Calendar and several other options don't seem to import .ics files properly. KOrganizer looks promising, but I can't find a way to set a default time zone or region, so I have to choose it for every event. It also appears to forget configuration changes after restarting. What calendar would you recommend for straightforward .ics importing and persistent regional settings?
2 Answers
GNOME Calendar can sometimes open an .ics file directly: locate the file in the file manager, right-click it, and choose Calendar under “Open With.”
Thunderbird includes a calendar with an import feature. If you already use Thunderbird for email, its calendar may be the simplest option to try.

I tried opening the file that way, but it still didn't work for me.