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 "Great and Holy Week", or "Passion Week". Since the Orthodox liturgical day starts at sunset (as it has from antiquity), Holy Monday services begin Sunday evening, at the normal timing for Monday Vespers (Vespers is the first service of the day). However, during Holy Week, in most parishes, many service times are advanced from six to twelve hours in time and celebrated in anticipation, which permits more of the faithful to attend the most prominent services. Thus, it is the matins service of Great Monday that is on "Palm Sunday" evening in parish churches and often vespers is in the