Responsories for Holy Week Maundy Thursday and Good Friday respectively, rather than on a sequence of names referring to Maundy Thursday, Good Friday and Holy Saturday respectively. The responsories following each lesson of these matins (so also 27) were usually sung, and these are the Tenebrae Responsoria, or the Responsories for Holy Week. The name of a collection of such responsories may also refer to the Holy Triduum, as in Orlande de Lassus' "". Maundy Thursday is the fifth day of the Holy Week (Latin: Feria V or Feria Quinta). In Latin the feast is also indicated as "In Cœna Domini" ("At the meal
Week called an octave, particularly in Roman Catholic liturgy. In German, the phrase "in acht Tagen" (literally "in eight days") means one week from today. In Italian, the phrase ("oggi otto" (literally "today eight") also means one week from today. Weeks in a Gregorian calendar year can be numbered for each year. This style of numbering is commonly used (for example, by schools and businesses) in some European and Asian countries, but rare elsewhere. ISO 8601 includes the ISO week date system, a numbering system for weeks – each week begins on a Monday and is associated with the year that