Hey @JulienDelRio, in general, Luxon should be able to handle RFC2822/RFC822 dates, but it seems to struggle with the format used by this particular feed. I am not entirely sure if French names for dates and months are in line with the specs tbh.
The feed seems to return an isoDate field for almost all items though:
Hi Julien,
I tried using the isoDate from your rss feed. The problem is only 29 of 51 items seem to have the isoDate field (see screenshot). For the remaining 29 the date formatting is working. It would be better if you work with iso dates, i.e. if your rss feed would return it properly.