The calendar may be uncertain—but the miracle is not. The Light entered the darkness, and that’s worth celebrating. Every December, right on cue, the same claim resurfaces: “Jesus wasn’t really born on December 25.”  “Christmas is just a pagan holiday.”  “Christians stole it from Rome.” And inevitably, a few self-appointed theological party crashers feel obligated to inform everyone that celebrating Christmas is historically ignorant at best—and spiritually compromised at wor