Just what is Harvest Festival?
It’s a time when we honor our hero, the great Uther the Lightbringer!
You can pick up the quest to do so just outside of Ironforge. There’s also a guy selling neat fireworks [I love the Ground Flower myself – set about 5 of those off in the Auction House sometime!]. And you can collect free food from the tables there that restores a percentage of your health/mana – [harvest boar, harvest fruit and harvest fish for health; harvest nectar for mana].
Once you have the quest you fly up to Chillwind Camp and run over to Uther’s Tomb. Once there, lay the tribute down, and fly back to IF to turn the quest in. In return you get 13g23s [at 80] and a book – For the Light.
Why should you do it? Free XP for toons not at max level. And free gold if you are. Also the RP factor/lore is there for those interested. I’m still trying to figure out why my death knight felt compelled to honor Uther…
No achievements associated with this specifically.
But this means Brewfest is near! [Monday]
ETA: A couple days after you do the quest you’ll get a [Bounty of the Harvest] in the mail. It provides 4 harvest food on a 12 hour cd.