Today, January 1, the Church celebrates the the solemnity of Mary, Mother of God. The title "Mother of God" was given to Mary formally at the council of Ephesus in AD 431. It is not meant to exalt Mary so much as to emphasize that Jesus Christ was fully God and fully Man. Mary is not the mother of Jesus human nature only, but since she gave birth to the person of Jesus Christ, who was both God and Man, she gave birth to the Son of God as well as the Son of Man.
Since Mary is also the Queen of Peace, the Church also celebrates the World Day of Peace today. Pope Bendict's theme for today is 'If You Want to Cultivate Peace, Protect Creation." His message can be found here.