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
Perennial calendar by Auguste Comte (1849); and the International Fixed Calendar, by Moses B. Cotsworth (1902), and championed by George Eastman. Blank-day reform proposals face a religious objection, however. Sabbatarians, who are obliged to regard every seventh day as a day of rest and worship, must observe their holy day on a different weekday each year. Leap week calendar plans often restrict common years to 364 days, or 52 weeks, and expand leap years to 371 days, or 53 weeks. The added week may extend an existing month, or it may stand alone as an inserted seven-day month. The leap-week calendar may