This is a sacred Holiday that many Wookiees see as a day they have to return to their planet to celebrate. It can be celebrated over the course of many days. Life Day on Kashyyyk is to celebrate their diverse ecosystem and the many forms of life it encompasses. It is also a day to remember the deceased and the younger generations. It is now more widely celebrated across the ‘Star Wars’ galaxy, however, for a long time it had been celebrated once every three years. By the time of the Galactic Civil War, its importance to the Wookiees had become more pronounced. “Because Wookiees were spread across the galaxy, either for personal reasons or due to their enslavement to the Galactic Empire, the holiday was celebrated as a way to remain in touch with their history,” according to Wookieepedia. 

“This holiday is yours, but we all share with you the hope that this day brings us closer to freedom, and to harmony, and to peace. No matter how different we appear, we’re all the same in our struggle against the powers of evil and darkness. I hope that this day will always be a day of joy in which we can reconfirm our dedication and our courage. And more than anything else, our love for one another. This is the promise of the Tree of Life.” ~Princess Leia Organa~