Here’s the reason behind every one of the Prudential Center’s light-up colors this month

Look up.

The top of the Prudential Tower lit up during "31 Nights of Light." Prudential Center

For the 10th year, the top of the Prudential Center will glow a different color each night in December to support nonprofit organizations. The event, “31 Nights of Light,” helps the organizations gain visibility — literally — during the holiday season.

On their designated nights, members of the organizations will “flip the switch” and mark the occasion with musical performances and speakers. Here’s the 2018 “31 Nights of Light” schedule.

Dec. 1: Brain Injury Association of Massachusetts
Dec. 2: Hanukkah light up
Dec. 3: WriteBoston
Dec. 4: Women’s Suffrage Celebration Coalition of Massachusetts
Dec. 5: Children’s Advocacy Center of Suffolk County
Dec. 6: RESOLVE New England
Dec. 7: Boston Bruins Foundation
Dec. 8: Boston’s Forgotten Felines
Dec. 9: Empowerment Through Integration
Dec. 10: Breakthrough Greater Boston
Dec. 11: Cancer Education and Research Institute
Dec. 12: The Salvation Army Ray & Joan Kroc Corps Community Center
Dec. 13: One Brick Boston
Dec. 14: National Psoriasis Foundation
Dec. 15: Dysautonomia International
Dec. 16: Amnesty International
Dec. 17: The Children’s Room
Dec. 18: Playworks New England
Dec. 19: Canine Companions for Independence
Dec. 20: Rosie’s Place
Dec. 21: Oldways
Dec. 22: Federation for Children with Special Needs
Dec. 23: Silver Lining Mentoring
Dec. 24: RESPOND, Inc.
Dec. 25: Christmas light up
Dec 26: Huntington’s Disease Society of America
Dec. 27: Pediatric Brain Tumor Foundation
Dec. 28: Hearth, Inc.
Dec. 29: The Arc of Massachusetts
Dec. 30: Cradles to Crayons
Dec. 31: First Night light up