Q. 1. I heard a reference to "Spy Wednesday." What is the Catholic Church's s interpretation of "Spy Wednesday?"

A. 1. In the Catholic Church, Holy Wednesday, also called Spy Wednesday, or Good Wednesday (in Western Christianity), and Holy and Great Wednesday (in the Eastern and Oriental Orthodox Churches), is the Wednesday of Holy Week, the week before Easter. It is followed by Maundy Thursday, also called Holy Thursday.

On the Wednesday before His death, Jesus was in Bethany, in the house of Simon the Leper. As he sat at the supper table with his disciples, a woman named Mary anointed Jesus' head and feet with a costly oil of spikenard. The disciples were indignant, asking why the oil was not instead sold and the money given to the poor. But Judas Iscariot wanted to keep the money for himself. Then Judas went to the Sanhedrin and offered to deliver Jesus to them in exchange for money. From this moment on, Judas sought an opportunity to betray Jesus.

In reference to Judas Iscariot's intent to betray Jesus, formed on Holy Wednesday, the day is sometimes called "Spy Wednesday". (The word spy, as used in the term, means "ambush, ambuscade, snare".)

[Source: https://en.wikipedia.org/wiki/Holy_Wednesday]