So I think we can consider Discourse as canonical at this point.
The Events plugin has been updated with Location stuff, and you can also psuedo-schedule events directly in a post using [date], e.g. “next coffee is on May 8, 2018 10:54 AM (Europe: Paris), May 8, 2018 9:54 AM (Europe: London), May 8, 2018 4:54 AM (America: New York), May 8, 2018 2:24 PM (Asia: Calcutta)” - see Site updates for more details.
Next is what to do with the website - I can see a few options
[import notes - poll data lost during re-import]
I lean towards a 302 redirect, especially for those who may have added the ICS to their calendar (the new link is webcal://community.theforeman.org/c/events/l/calendar.ics?time_zone=Europe/London for an anonymous viewer). Embedding the data in /events sounds nice but probably more work than its worth.