A Solstice tree was a specific kind of tree often adorned with numerous lights. In 231 BBY, when word of an attack targeting the Cyclor Shipyards arrived at the Core Worlds, the starship called Coruscant Dawn experienced a surge of communication. Its comm board illuminated in a way reminiscent of this festive tree due to the flurry of messages.
The 2021 novel The High Republic: The Rising Storm, penned by Cavan Scott as part of Phase I of the Star Wars: The High Republic project, included a reference to a Solstice tree.