This year’s Harvest Festival will be running from September 10th through September 17th.
The Harvest Festival event has one quest that leads you to honor a specific hero based on your faction. Those who are part of the Alliance will be sent to the tomb of Uther Lightbringer in Western Plaguelands. If you are part of the Horde you will be sent to the tomb of Grom Hellscream in Ashenvale. A few days after completing the quest an item called Bounty of the Harvest will show up in your mailbox.
This event is a great opportunity to grab some nice food and is accessible without needing to complete the quest. Harvest Bread, Harvest Fish, and Harvest Boar will restore 4% of your health per second for 25 seconds. Harvest Nectar will restore 4% of your mana per second for 30 seconds. You will be able to carry a max stack of 20 of these items.
There are also 4 different types of spirit shards that players can get. They are an Anxious Spiritshard, Forlorn Spiritshard, a Peaceful Spiritshard, or a Vengeful Spiritshard. These items are NOT ALLOWED!
This quest will be allowed for Iron, Tin, Working Man, Green Man, Pacifist, Iron Team, and Green Team challengers. Sorry Blood Thirsty and Blood Thirsty Team challengers while you can not complete the quest you are allowed to restock your food supply.
For a more in-depth look at the event please refer to WoWHead’s guide.