URL scheme collisions

[chantastic]

I'm working on a possible Monthly recurring event and realizing that our url-scheme isn't particularly well-suited for this notion.

Problem title:
title: Mastermind Monday

I could prefix with the month:
title: Mastermind Monday — August
But we still have collision after a year

We could add a year, or an increment or but these feel a little clunky and have to be manually enforced:
title: Mastermind Monday — August, 2021
title: Mastermind Monday #1

In an effort to keep permalink for all events, I'm curious if we should introduce a dates to new event URLS. If so, what's the best way to handle old urls:

• _redirects
• add permalink to previous events
• only change the URL scheme for specific event types

Thanks for your thoughts on this :)