Search engine optimization can be tricky and with the major providers doing everything they can to keep you out of their proverbial black box of secrets, it's nice to occasionally get some practical advice.
Google's John Mueller recently posted some guidance, for example, on how to deal with recurring and updated items - such as when you have a recurring event or a regularly published content item such as a quarterly report and want to maximize the asset's value for search.
In the case of an event specifically, Mueller's guidance is to place the current version on a generic, non-versioned URL (/event-asset/) and copy last year's version onto a versioned URL (/event-asset/2016/).
Muller suggested that doing it this way will help the generic URL to gain value over the years, while still allowing the older versions to be accessible if someone explicitly looks for them.