The English word “Merry”
Did not originally convey
“Jolly,mirthful”
It was more along the lines of
“Blessed,peaceful”
A deep down inner joy
Rather then revelry
One gets a sense of its original meaning
In the well known carol
“God rest ye merry, gentlemen “
As can be seen from the comma
The word is not used to describe
“Jolly”gentleman
But rather was a
Blessing from God
Invoked upon them
God rest ye peaceful gentlemen
Thus
Merry Christmas
Is a Blessing