Jesus, after he rose from the dead, as stated in Cyanide and Happiness. Easter is "Zombie Jesus Day."
Teacher: Two weeks after he was crucified, Jesus rose from the dead.
Student: Oh, so he was Zombie Jesus?
The day before valentines day when its all awkward and you have no idea what to do. Named for Saint Derpentine, who lives in Derps everywhere.
Guy 1: What are you getting Shelly for Valentine's?
Guy 2: I dunno dude, its gonna be a loooong Derpentine's Day...