Mass for Spy Wednesday:

Spy Wednesday is a term used to refer to the Wednesday of Holy Week, which is the week leading up to Easter Sunday in the Christian calendar. It is also known as Holy Wednesday, Great and Holy Wednesday, or Good Wednesday. The term "Spy Wednesday" is more commonly used in the Roman Catholic tradition.
The name "Spy Wednesday" is associated with the betrayal of Jesus Christ by Judas Iscariot. According to Christian beliefs, Judas agreed to betray Jesus to the authorities on this day, leading to Jesus' eventual arrest and crucifixion. The term "spy" reflects the idea that Judas was acting as a betrayer or informant.