This diversity calendar starts with a month-long celebration:
Universal Human Rights Month
 
December 1: World AIDS Day, encouraging activism and education on HIV and AIDS
December 3: International Day for People with Disabilities, planned to raise awareness of the issues people with disabilities face.
December 6: St. Nicholas' Day, the saint's day for the inspiration for modern-day Santa Claus celebrated in western Christian countries.
December 10: International Human Rights Day, started by the UN in 1948 upon the adoption of the Universal Declaration of Human Rights.
Decembre 16-24: Las Posadas, a religious festival celebrated in Mexico and other parts of Latin America that commemorates the journey Mary and Joseph made to Bethlehem before Jesus's birth.
December 18-26: Hanukkah, the Jewish festival of lights that celebrates the victory of the Maccabees over King Antiochus.
December 21: Yule Winter Solstice, a pagan celebration of the first day of winter.
December 24: Christmas Eve, celebrating Mary and Joseph's arrival in Bethlehem for Jesus's birth.
December 25: Christmas, a western Christian holiday celebrating the birth of Jesus.
December 26: Kwanzaa, a seven-day celebration of African-American culture and life originally founded in 1966.
December 31: New Year's Eve, the last day of the year in the Gregorian calendar and celebrated as the passing of one year and the beginning of another.