Use same URL for pages published seasonally
I have a client who uses Wordpress and keeps separate pages with content and publishes/unpublishes them seasonally (they contain activities and schedules based on whichever season it currently is).
However, each page has its own URL (example.org/activities, example.org/activities-1, example.org/activities-2). This isn't really ideal for folks bookmarking/linking to the page(s) or for SEO.
What might be the best approach without relying on the user too much to make manual changes to the URL, or to copy & paste content between pages?