#19 on the countdown is the very first Batman Christmas story, by Bill Finger, Bob Kane, Jerry Robinson and George Roussos in 1941's Batman #9, titled "Christmas."

The whole thing is an extended (if not always consistent) riff on Charles Dickens' classic A Christmas Carol, as Batman and Robin are drawn into proving that Bob Cratchit was framed for murder when his son, little Timmy, writes a letter to Santa asking for his father back...

Batman and Robin have to prove that Bob is framed, so they try to take down the REAL culprits. I love this sequence where the bad guys are using a Santa Claus as a lookout. The sight of Batman and Robin chasing Santa Claus is amazing...

Anyhow, Batman ends up using the "Ghost of Christmas Past" to get a confession from the bad guy and the day is saved...

Father and son are reunited, but Robin is feeling down...

This leads to a bizarre conclusion, with Batman giving Robin some almost incomprehensible speech about Santa Claus and Linda Page (one of Batman's least-inspired girlfriends and yet the first one to make it into a Batman movie) being there, despite not knowing Batman's secret identity and then the fourth wall is broken and it is just marvelous...