Responsories for Holy Week nocturn of Maundy Thursday are from Saint Augustines "Enarrationes in Psalmos" Second of Poulenc's "Sept répons des ténèbres". The lessons for the third nocturn of Maundy Thursday are from 1 Corinthians II: 17-34 First of Poulenc's "Sept répons des ténèbres". Good Friday is the sixth day (Latin: Feria VI or Feria Sexta) of the Holy Week. In Latin the occasion is also indicated as "In Parasceve" (Parasceve being Latin for Friday). Thus the second set of nine responsories for Holy Week can appear under titles such as "Feria VI – In Parasceve". The lessons of the first nocturn of Good
Determination of the day of the week where is the day of the week (counting upwards from 1 on Sunday instead of 0 in Gauss's version); and , , and are numbers depending on the day, month, century and year which are tabulated in the "Complete table: Julian and Gregorian calendars" above. Note that the numbers tabulated for y can also be described by the following equation: Where So, for example, if you want to find 'y' for the year 1987: In Zeller’s algorithm, the months are numbered from 3 for March to 14 for February. The year is assumed to begin in March; this means, for