St Matthew notes that King Herod asked the Magi to stop in after they finished their pilgrimage to the new royal child and let him know where he was, so he could go and pay him homage. Warned by a dream, they went home by another route. However:
Herod perceiving that he was deluded by the wise men, was exceeding angry; and sending killed all the men children that were in Bethlehem, and in all the borders thereof, from two years old and under, according to the time which he had diligently inquired of the wise men. Then was fulfilled that which was spoken by Jeremias the prophet, saying: A voice in Rama was heard, lamentation and great mourning; Rachel bewailing her children, and would not be comforted, because they are not.
My oldest friend emails from back East: "Murderous day but great series of chants for the Holy Ones over whom Rachel keened."
Today would have been my dad's 87th birthday. We used to joke that he was born on the right day because despite his WWII experience and working in a tough industry in NYC, he always seemed to carry a certain innocence about the world, which his much wiser children (!) found endearing.