I so love in-game events... this will be the first in Lord of the Rings since it went live, and I am glad to see the tie-in with festivals from Tolkien lore.

Announcing the Summer Solstice Festival!
We’re happy to announce that from June 20th to July 10th, Middle-earth will be celebrating with its Summer Solstice Festival!

Let me sum it up: each race has its own version of the festival, so you should plan to catch them all. There will be much drinking, carousing, fireworks and some event called Hobnanigans which involves... CHIKKINS!

Beer, fireworks and chickens.
You KNOW it's going to be a good time.

Get all the information from the source!