Holy Week XII. In this Mass, the bishop blesses separate oils for the sick (used in Anointing of the Sick), for catechumens (used in Baptism) and chrism (used in Baptism, but especially in Confirmation and Holy Orders, as well as in rites such as the dedication of an altar and a church). Tenebrae (Latin for "shadows" or "darkness") is celebrated within Western Christianity on the evening before or early morning of Maundy Thursday, Good Friday, and Holy Saturday. Tenebrae is distinctive for its gradual extinguishing of candles while a series of readings and psalms is chanted or recited. Tenebrae services are celebrated
Armelin's calendar mind of modest ability will learn in a few minutes the weekday with which each month invariably begins, and will be able to compute quickly the day of the week upon which any day of any month falls. Each stated holiday falls upon its invariable day of the week. Thanksgiving Day falls always on November 30. A major disadvantage is for sabbatarians, who are obliged to worship every seventh day. Their holy day will occur on a different weekday every year. Armelin's project received the first premium of the French Astronomical Society. The World Calendar, roughly identical, has been promoted