Known as Spy Wednesday, recalling Judas Iscariot's agreement to betray Jesus. The last ordinary day before the Triduum begins at sundown on Thursday.

The liturgical observance of Wednesday in Holy Week has been shaped by two parallel streams. In the East, the emphasis falls heavily on the anointing at Bethany and the contrast between devotion and betrayal; Byzantine hymnography for this day is rich with references to 'the sinful woman' who recognized Christ while Judas did not. In the West, the medieval tradition gave the day its popular name 'Spy Wednesday,' and the focus shifted more toward the conspiracy narrative. The BCP 2019 places this day within the protected days of Holy Week — no other observance can displace its propers. When the Annunciation (March 25) falls during Holy Week, it is transferred, illustrating the absolute liturgical precedence of these days. Some parishes observe Tenebrae services on Wednesday evening as anticipatory preparation for the Triduum, though the BCP itself assigns the principal Tenebrae elements to Maundy Thursday. The day serves as a hinge between the teaching ministry of Holy Week's earlier days (when Jesus taught in the Temple) and the Passion narrative that begins in earnest at the Last Supper.

Wednesday of Holy Week carries the informal name 'Spy Wednesday' — a medieval English designation recalling Judas Iscariot's agreement to betray Jesus to the chief priests (Matthew 26:14–16, Mark 14:10–11, Luke 22:3–6). The Synoptic Gospels place this arrangement two days before Passover, and the tradition of associating Wednesday with Judas's treachery is attested from at least the early medieval period. In the Byzantine tradition, this day is called 'Holy and Great Wednesday' and is associated with the anointing at Bethany (Matthew 26:6–13), where the woman's lavish devotion stands in deliberate contrast to Judas's calculating betrayal — the one pouring out costly nard, the other selling his Master for thirty pieces of silver. The Western lectionary tradition has varied over the centuries in which Gospel passage it assigns: some years emphasizing the anointing, others the conspiracy. The day also holds typological significance as the last 'ordinary' day before the Triduum begins at sundown on Thursday. In the early Church, Wednesday and Friday were already established as station days — days of fasting and prayer — which gave Wednesday of Holy Week a natural intensification of the regular Wednesday fast. The overlap with Passover preparation in Jesus's own time adds a further layer: as the Jewish community prepared lambs for slaughter, the Lamb of God was being handed over by one of his own.