Go Caroling Day
Go Caroling Day is held on December 20. This event in the second decade of the month December is annual. 
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Yuletide carols being sung by a choir or a gaggle of neighborhood children is a quintessential Christmas scene. About 16% of Americans say they go caroling, according to a 2013 survey by Pew Research Center.
The singing of carols reminds us that God, in his love for us, sent his son to be one of us. Just as that first christmas was marked by singing, so christians through the centuries have celebrated and borne witness through song to the coming of the Messiah.
An early version of caroling dates back to the 13th century. It began in the oral tradition, but didn't always involve Christmas or even singing.
Similar holidays and events, festivals and interesting facts
Look for an Evergreen Day on December 19
International Emo Day on December 19
Flashlight Day on December 21
Humbug Day on December 21 (This day was created to allow us an opportunity to express our frustrations);
Look on the Bright Side Day on December 21
Roots Day on December 23
HumanLight Day on December 23 (is a secular holiday that focuses on the "positive, secular human values of reason, compassion, humanity and hope");
Festivus on December 23 (a holiday made popular by the sitcom Seinfeld, as an alternative to the pressures and commercialism of the Christmas season)