For the calendar reminders, my thought was to, instead of each reminder starting a new topic, collecting them as replies to one. (With a separate topic for each group.) This could be a topic with a calendar at the top like Meeting and Publication Schedule.
The problem with just using that and ignoring Fedocal is that Fedocal is the project mechanism for not double-booking meeting rooms, and unless we come up with a different solution for that, it seems like it’s best to keep that authoritative so there’s just one place to edit.
So my thought was to have that send the meeting reminders to the calendar topic (but set that topic to auto-delete replies to keep it uncluttered). The only catch is that Fedocal doesn’t put dates in the right format. We could either patch it to do that, or we could make a bot that follows the message bus messages Fedocal generates and posts based on those.