The time it takes for the Christmas tree to settle can vary depending on the size and type of tree, the location it's placed, and the environment it's in. Generally, it can take anywhere from a few hours to a few days for the tree to stabilize and settle in place. It's important to keep the tree well-watered and secure it to prevent it from falling or becoming unstable. Once the tree is settled, it should remain in place for the duration of the holiday season.