Hey Harald,
Thanks for your interest in the plugin! I’m happy to answer your questions:
1. The Events Calendar, Events PRO, and all the add-ons just use whatever date settings are set in your WordPress installation itself – so if in Settings > General in your WordPress admin, you set the date and time options to use a 24-hour clock, then The Events Calendar, PRO, and the add-ons should all respect that without issue.
2. In list view, your event descriptions can actually have a lot of the same formatting abilities as any other content – paragraph tags, link tags, embdedded images, bold and italic text tags, etc. Are these the sort of content tags you mean?
Let me know if my answers here are helpful at all, or if you have any other questions or concerns – and if I didn’t address your questions accurately here, or missed a detail or two, please let me know in detail and we’ll give your questions another shot 🙂
Thanks,
George