Not according to Phillip Jensen (in ‘Why People are Not Converted at Christmas’):
“Each year thousands of people come to carols services in church buildings, parks, schools and even pubs – but how often do you ever hear of somebody being converted? Instead of it being one of the high points of Christian Christianity it is the high point of Cultural Christianity. But Cultural Christianity seems inured to Christian Christianity.”
Here’s Carl Laferton in a similar vein:
“Put on a good carol service (especially if you have a picturesque church building), and they will come. Put on a Christingle or a nativity service (particularly in the late-afternoon Christmas Eve slot, when every parent in the land needs a break), and they will come. Invite your neighbours and friends to such events, and they may well come—and they will certainly not think it weird to be asked.
And so, lo! The churches of the United Kingdom (especially those with previously mentioned picturesque buildings) did discover that a great multitude didst come and hear the gospel in December, and they felt good, and rested upon their laurels/door wreaths.
And then in January, everything went back to normal. And the ‘long term trends’ of decline in church attendance (which you will find mentioned in the seventh paragraph of the Church of England’s article which headlined with the Christmas attendance figures) continued.”