Boston lit its official Christmas tree on Thursday night on the Common.
The 45-foot white spruce is from the appropriately named Christmas Island in Nova Scotia.
Each year, the Canadian province gives Boston a tree as a "thank you" for the city's help back in 1917. After an explosion devastated the city of Halifax, the city sent a train carrying supplies and emergency personnel.
Mayor Michelle Wu was joined by Nova Scotia Premier Tim Houston, who said he hopes the tree symbolizes for Bostonians that "no act of kindness goes unnoticed."
"I ask the people of Boston, when they see this tree lit up on the amazing Common there, that they think of us and they think of the people of Nova Scotia," Houston said. "They love you and they remember what you did."
The holiday lights along the Commonwealth Avenue Mall will be turned on as well.