UPDATE: Watch the full speech on YouTube.
LONDON -- Queen Elizabeth II will use her Christmas broadcast to emphasize that light can triumph over darkness after a difficult year.
The queen will note there have been "moments of darkness" in the last year, which has been marked by extremist attacks and a migrant crisis that has overwhelmed Europe, but cites the Bible as offering solace.
"The Gospel of John contains a verse of great hope, often read at Christmas carol services: 'The light shines in the darkness, and the darkness has not overcome it,'" the queen plans to say, according to excerpts released by Buckingham Palace.
The prerecorded speech - a longstanding Christmas tradition - will be broadcast on radio and television in Britain at 3 p.m. (1500 GMT, 10 a.m. EST) and in many parts of the British Commonwealth on Christmas Day. It will also be posted on the royal YouTube channel.
The 89-year-old queen writes the brief speech herself, often reflecting on her own personal beliefs and stressing the importance of family. She plans to note the 70th anniversary this year of the end of World War II by thanking those who served in the conflict.
The queen, her husband Prince Philip and senior members of the royal family plan to attend church services Christmas morning and spend most of the day at her sprawling Sandringham estate in Norfolk, 175 kilometres north of London.
They often mingle briefly with holiday well-wishers gathered outside the church. Many in the crowd will be watching to see if Prince William and his wife Kate's young children - Prince George and Princess Charlotte - attend the service.
There is usually a gala Christmas lunch for the royals after church, followed by a walk outside.
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