《快乐的上帝》（英语：）或译《先生，愿主赐给您们欢欣》、《天赐欢乐》是英国经典的圣诞颂歌，它是16世纪或以前最古老的现存颂歌之一。
这首歌有不同的版本在（歌词和旋律），它们在英国的不同地区有着悠久的传统。最普遍采用的是歌词由牛津大学出版社出版的版本。
1. God rest you merry, gentlemen,
Let nothing you dismay,
For Jesus Christ our Saviour
Was born upon this day,
To save us all from Satan's power
When we were gone astray:
2. In Bethlehem, in Jury,
This blessed Babe was born,
And laid within a manger
Upon this blessed morn,
The which His Mother Mary
Did nothing take in scorn:
3. From God our heavenly Father
A blessèd angel came,
And unto certain shepherds
Brought tidings of the same,
How that in Bethlehem was born
The Son of God by name:
4. The shepherds at those tidings
Rejoicèd much in mind,
And left their flocks a-feeding
In tempest, storm and wind,
And went to Bethlehem straightway,
This blessèd Babe to find:
5. But when to Bethlehem they came,
Whereat this Infant lay,
They found Him in a manger,
Where oxen feed on hay;
His mother Mary kneeling,
Unto the Lord did pray:
6. Now to the Lord sing praises,
All you within this place,
And with true love and brotherhood
Each other now embrace;
This holy tide of Christmas
All others doth deface:
