Describe what happens to custom components/unknown components

[niccokunzmann]

Is your feature request related to a problem? Please describe.

I would like to merge to calendars and I would expect everything to turn up by default.

• known rfc components
• unkown X- components
• generated timezones if absent for all components

If e.g. only VEVENT is there, I expect all the VTIMEZONE components also to be there if they are used by the events.

That should be documented.

Describe alternatives you've considered

Additional context

collective/icalendar#1124 considers timezones.

That is good. Ideally, we can get valid calendars as output always - especially on the command line.
For optimization, in Python, we can skip extra steps.

Code of Conduct

• I agree to follow this project's Code of Conduct

Are you willing to resolve this issue by submitting a Pull Request?

• Yes, I have the time, and I know how to start.
• Yes, I have the time, but I don't know how to start. I would need guidance.
• No, I don't have the time, although I believe I could do it if I had the time...
• No, I don't have the time and I wouldn't even know how to start.