Holy Week funeral marches, hymns or "marchas" written for the occasion. Music for the Holy Week includes Lamentations of Jeremiah the Prophet, Responsories for Holy Week, Passion oratorios and Easter oratorios. Tomás Luis de Victoria's "Officium Hebdomadae Sanctae" (1585) contains settings of 37 texts for the Catholic liturgy of the Holy Week. Carlo Gesualdo's "Responsoria et alia ad Officium Hebdomadae Sanctae spectantia" (1611) contains settings of all 27 Tenebrae responsories (for matins of Maundy Thursday, Good Friday and Holy Saturday), and of a few other text for use in lauds of the Holy Week. "Leçons de ténèbres" as composed by various French
Leap week calendar Leap week calendar A leap week calendar is a calendar system with a whole number of weeks every year, and with every year starting on the same weekday. Most leap week calendars are proposed reforms to the civil calendar, in order to achieve a perennial calendar. Some, however, such as the ISO week date calendar, are simply conveniences for specific purposes. The ISO calendar in question is a variation of the Gregorian calendar that is used (mainly) in government and business for fiscal years, as well as in timekeeping. In this system a year (ISO year) has 52 or 53