Being misty-eyed about a perfect Christmas past will do you little good.
The tradition of carol singing at Christmas appears to be going through a revival and it's bringing communities together.
If you find yourself humming White Christmas this year don't worry ... you're not alone – and the science of earworms suggests why.
A Christmas tree could be for life, not to be dumped after one festive season.
But they haven't been without controversy.
Good Christian Men, Rejoice dates from the 14th century; O Come, All Ye Faithful may contain covert Jacobite symbolism and Silent Night is now UNESCO recognised.