Feast of the Ascension term "Holy Thursday" to mean Ascension Day is rare, and the term is more generally applied by most Christian denominations to Maundy Thursday in Holy Week. In Western Christianity, the earliest possible date is April 30 (as in 1818 and 2285), the latest possible date is June 3 (as in 1943 and 2038). In Roman Catholicism, the Ascension of the Lord is a Holy Day of Obligation and in the Anglican Communion, Holy Thursday is a Principal Feast. The three days before Ascension Thursday are sometimes referred to as the Rogation days, and the previous Sunday — the Sixth Sunday
Holy Week the liturgical day starts from the evening before a calendar day, the prayers of Palm Sunday begin on the evening of Lazarus' Saturday. Throughout Holy Week, a paschal service is conducted each evening, starting on Sunday night (the eve of Monday), and every morning, up until Easter. These paschal services take place in the middle of the church, not on the altar, because Jesus suffered and was crucified on Golgotha, outside of Jerusalem. The altar is bared of all its coverings and relics. Each day service is divided into 5 "hours"; The First Hour, The Third Hour, The Sixth Hour,