The Preparation for, and the Celebration of, the Passover.
Judas offers to betray Jesus:
Related Commentaries of Mark 14:10
Mark 14:10-11
10 And Judas Iscariot, one of the twelve, went unto the chief priests, to betray him unto them.
11 And when they heard it, they were glad, and promised to give him money. And he sought how he might conveniently betray him.