There's a story behind this you might want to know.

Many years ago, I asked the gods to create a new poll ideas quest thread because the original thread got too long, longer than that famous PMD thread that anecdotally shouldn't be linked in the chatterbox because everyone following the link at the same time overloads the server. The gods agreed, and have created a new thread. Unfortunately, they have added a year number in its title. Since then, people got confused by seeing last year's number in the thread and keep asking for a new thread every year.

There's no real need to create a new one every year. In fact, it makes it more difficult to suggest poll ideas, because you have to search for suggestions in more threads.(Luckily if you know good search keywords, Super Search simply lets you search in the Quest section, but often it is more convenient to just load the full text of those threads.) Anyway, because of this confusion coming up all the time, we seem to be stuck and get a new thread every year.

Anyway, now I understand now so many commercial companies label their games or periodicals or other products with a year number in the future.