December 6 is St. Nicholas Day, which honors the early Christian saint who many believe was the inspiration for Santa Claus.

On December 8 Buddhists observe Bodhi Day, commemorating the day Buddha found enlightenment, according to tradition, while sitting under a bodhi tree.

For Catholics, December 8 is the Feast of the Immaculate Conception, which celebrates their belief that Mary was conceived without sin.>

Christians around the world are observing Advent, the time of spiritual preparation before Christmas. The season kicked off in Bethlehem, the traditional birthplace of Jesus, with a series of festivities at Manger Square. Germany celebrated the opening of its famed Christmas markets. And in Washington, First Lady Michelle Obama unveiled the White House Christmas decorations.