How to import Calendar from Apple to eCloud

Successfully imported my Apple iPhone Contacts to eCloud by excellent instruction here but now wish to do the same with Calendar with pictorial steps. Anyone?
Thank you

true, a Guide with screenshots would be helpful, I can’t find one and no iphone around to create one. What you look for is “.ics export” in any form, either via…

You can then import the .ics File within - it would be similar to the second half of this video - Nextcloud - Import Calendar Data (ics file) - YouTube