Or the longest wait for an achievement.
My daughter announced that Brewfest had begun last weekend.
Now, last year the instance group pretty much beat Brewfest to death. I got the Brewmaster title, we collected tokens, we killed Coren Direbrew nearly two dozen times, lederhosen was worn, and we danced in the streets of Dalaran.

How you doin'?
There was just one Brewfest achievement left, the Brew of the Month Club.

That Last Brewfest Achievement
It is an optional achievement. You don’t need to do it to get the Brewmaster title. But the completionist in me wanted to check off that last box.
To get there, one had to earn enough tokens to buy a membership… some 200 tokens for the privileged. So I diligently did the Brewfest daily quests… well… daily until I had enough tokens to buy my outfit, my beer keg, my membership, and whatever else I needed.
And so, the year long brew of the month club membership began.
On the first of each month a new brew would appear in my in-game mailbox. All I had to do was drink it, and I was another step closer to that last achievement.
Months went by and little checks went into the achievement tracker.
August 1st came, I drank the brew of the month. I was, at that point, just one beer away from being done.

And then I let my World of Warcraft account lapse. The instance group was playing Lord of the Rings Online this summer, I was out of work so I was even less keen than usual to pay for an account I was not using, and my latest 3-month subscription term was due at the end of the first week of the month. I canceled my subscription.
So summer turned to autumn as we played in Middle-earth, leaving Azeroth for another time.
Then, as I said way up at the top, my daughter announced it was Brewfest. I was employed again, she wanted to run around and do some of the activities, and I wanted that last achievement. So I resubscribed after only a 6 week hiatus. It can be hard to stay away.
And the first thing I did was log on with Vikund to check my main for that last, oh so satisfying beer.
Only my mail box was empty. No beer for me.
I am going to guess that you have to be subscribed on the first of the month to get your monthly brew, and I was not.
Oh dear.
Still, I wanted to finish off that last Brewfest achievement.
So now I am back to doing daily quests to earn the 200 tokens. that will take me less than an hour each over four evenings to do.
Then I have to buy the membership.
And then I have to wait 11 more months until we’re back to September first. I have to remember to stay subscribed. And I have to drink that last beer.
See what the achievement oriented player will do, just to check off one box.