The webcal entries are a day before when they should be. I have tried other webcal apps and they put it on the right day.
Thank you for the information!
Yes, please contact the WiFi providers. I also recommend to use HTTPS URLs which can’t be intercepted by WiFi hotspots (you will get a cert error).
@rfc2822 Thanks a lot for your great support! I’ve just installed the new version and entered my subscriptions. I’ll report back in case I notice any problems.
By the way, you can find this information and more on https://icsdroid.bitfire.at/usage/