Hello, i have many articles about past events in my site on Joomla. I can't copy all of this to iCagenda, and i want just display events from standard Joomla category.

How can i do that?

Sorry fo my english.

Ok. I understand you. Thank you!

But If you want do it in future - the best way is something like "online-link" between iCagenda category and Joomla category, and it should work like this:
If you, for example, choose "link category" (or something like that) option in iCagenda config, and then you post some event into joomla category "events", that event also appears into iCagenda category;

And one more question:

What I need do to add additional fields are required when a user regs in to the event? I wish, for example, to make obligatory for filling, for example, ZIP-code and address?

Yep, being able to automatically make events from a normal article category will be a great addition to this software.

I just set aside Icagenda in a big project because that function is not possible….

Just want to add that it seem possible in other Agenda/Calendar/Events component.

Also you can probably use the Joomla articles setting “Start Publishing Date” — “Finish publishing Date” & “Created Date” for the Time of the events.

This will be a great addition to your system as Joomla article are always the most flexible way to present any type of content (Events or not) and use a familiar interface for the authors.