I'm having a customer who wants a WordPress page, and I don't have the best overview of the plugins and possibilities for this exact requirement my customer wants.

He arranges an seminar once a year, so for each year the site text and pictures look very different, but the main theme of the page stays the same. When the seminar is over for e.g. 2015, he wants to start fresh with the year 2016. The tricky thing, and my question is: He wants to make it possible to browse the 2013, 2014, 2015 ... (etc) versions of the page. So people can look backwards in the history of seminars. *Now keep in mind this is a page, and not a blog - so you can't just sort blog entries by the year.*

Now obviously the easiest but also the dirtiest trick to do this, is just to copy the database and page into a folder and link it. Though I was wondering if there is a more clean way of doing this - maybe a plugin of some sort or just some functions I did not think about.

It's a big plus, but not the definite requirement that it's easy enough for my customer to perform this yearly sweep on his own. With little knowledge of computers and websites. If not, still tell me your recommendation - then I will just help him that one time a year.