Also called Spy Wednesday, Great Wednesday, or Good Wednesday, this day is marked by the decision of Judas Iscariot—one of Jesus’ disciples—to betray Jesus to the authorities in exchange for thirty silver coins.
Matthew 26:14-16 New International Version (NIV)
Judas Agrees to Betray Jesus
14 Then one of the Twelve—the one called Judas Iscariot—went to the chief priests 15 and asked, “What are you willing to give me if I deliver him over to you?” So they counted out for him thirty pieces of silver. 16 From then on Judas watched for an opportunity to hand him over.