Santa's eight regular reindeer are Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner and Blitzen. Rudolph also worked for Santa during a particularly foggy Christmas Eve. Donner and Blitzen were originally called Dunder and Blixem.
At least 160 countries are known to officially celebrate Christmas on or around Dec. 25. However, many countries are known to have unofficial or similar celebrations around the same time.
A specific person did not start Christmas, but Christmas is a traditional holiday celebrated by people throughout the world for different reasons. People find joy in exchanging gifts with one another and honoring religious tradition, and early peoples celebrated Christmas for similar purposes. Although Christmas is celebrated on December 25 in America, the holiday is commemorated on the winter solstice and alternate days of the year in other nations.