Written by Michael Conrad, Torunn Gronbekk and Alex Segura; Art by Miguel Mendonca, Christopher Mitten, Fernando Pasarin and Andy MacDonald! Leap year only comes once every four years, and for most, an extra day on the calendar is a mild novelty. But for Calendar Man, it's a critical error in that which he holds most dear--and now, Batman and the GCPD respond to a deadly hostage situation, but can they work together to stop Calendar Man before it's too late? Then, Lois Lane dives deeper into a massive conspiracy--but will it swallow her up in the process? And lastly, the Question--with the help of a surprise guest star--unmasks the mysterious villain Zero!