Anyone have Additional content types for Kalender module?!

would be cool.

http://www.cloneportal.de/Downloads-cid-1.html <-- Kalender Module

Calendar content can be tricky, especially if the events repeat. Which date should the sitemap point to on a repeating event? How would it know?
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Most recent entry? he has that data "posteddate"

Let's say you want to display upcoming events in your feed (or a block, or anywhere else). If the event has a recent posted date, but represents multiple dates because it is a recurring / repeating event (e.g. every Wednesday), the class would need to be able to calculate (and sort) the repeating event dates along with other upcoming events (one-time events and other repeating events).

If Kalendar doesn't support repeating events (I'm not familiar with it, but I think it does not), it should work. But if it supports repeating events like nucalendar, the logic would be fairly complex.