If you are living in the Netherlands, have a look at these practical calendars to use via ICSdroid:
Add reminders to calendars
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There are some public calendars (like concerts events) that don’t have reminders and you can’t control the source, so it is impossible to set a reminder for now. For those it would be super helpful if you can set some fixed reminders (yes, more than one ideally) for all events in a particular ICS calendar. So I can set to get reminders for all concerts the day before and 2 hours before the event for example.
Thanks!