As a Proton Calendar user i should be able to put a URI to an external application in my calendar description and it display as a link so that i myself, as well as others, can quickly reference data pertaining to the meeting event.

Not just URLs to websites; but for someone who uses obsidian notes, i was surprised when i started dropping URIs into appointments and they did not turn into links. Simple hyperlink support would make it much easier for folks using external notes and other applications to quicky jump form calendar to event related notes.