The Blue Christmas Service is a Western Christian tradition observed on or around the longest night of the year, typically December 21. This service aims to comfort Christians who are grieving and struggling to find joy during the holiday season. It provides a quiet and contemplative worship experience as an alternative to more traditional gatherings, honoring those experiencing loss. The services tend to attract small, intimate crowds and are often referred to as "longest night services." While the tradition has been practiced in various Christian churches across the United States since its inception, it has also taken on a new meaning since 2016, when a movement began to honor law enforcement officers and their sacrifices during the festive period. This movement encourages participants to show support by incorporating blue lights or candles into their holiday decorations.