Foot washing "mandatum" (maundy), therefore, was applied to the rite of foot-washing on this day of the Christian Holy Week called Maundy Thursday. John 13:1–17 recounts Jesus' performance of this act. In verses 13:14–17, He instructs His disciples: Many denominations (including Anglicans, Lutherans, Methodists, Presbyterians, Mennonites, and Catholics) therefore observe the liturgical washing of the feet on Maundy Thursday of Holy Week. Moreover, for some denominations, foot-washing was an example, a pattern. Many groups throughout Church history and many modern denominations have practiced foot washing as a church ordinance including Adventists, Anabaptists, Baptists, and Pentecostals. The origin of the word "Maundy" has
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