Responsories for Holy Week of the Lord", referring to the Last Supper). Thus the first nine responsories for Holy Week can appear under titles such as "Feria V – In Coena Domini". When the naming is according to the preceding day, names like "Les neuf répons du mercredi saint" (The nine responsories of Holy Wednesday) can occur (Charpentier). The lessons of the first nocturn of Maundy Thursday are from Lamentations 1:1-14 (1:1–5, 1:6–9 and 1:10–14 respectively). The first responsory for Maundy Thursday sets the scene at Mount Olivet (in monte Oliveti), the episode referred to as the Agony of Christ at Gethsemane. The text
Determination of the day of the week possible to do all the calculations in one's head with a little practice). None of the methods given here perform range checks, so unreasonable dates will produce erroneous results. Every seventh day in a month has the same name as the previous: "Corresponding months" are those months within the calendar year that start on the same day of the week. For example, September and December correspond, because September 1 falls on the same day as December 1. Months can only correspond if the number of days between their first days is divisible by 7, or in other words, if their