Hey Rafael. You may be able to find a workaround solution by reviewing the forum archives here (from what I recall folks who changed the feed had the best luck with a third-party plugin of some kind), but it’s worth noting that this is definitely on our radar. We have had a lot of requests to make the RSS feed more specific to events (showing the date of the event, not the date of publication, and to include more events data).
We’re working on that now as we plan on including such a fix somewhere in the 2.1 lifecycle, given how many people are requesting it. That should be deployed sometime in the fall.
Hope this helps and sorry I couldn’t offer up more. If you have other questions or if you need anything else please let me know.