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Take the current Epact The age of the moon on January 1, used to determine the date of Easter and find the current Dominical Letter The Sunday Letter in the row of Dominical letters. This letter should be taken below the current Epact. If the current Dominical letter is found directly across from the current Epact, the next instance of that same letter further down must be used instead. All movable feasts are contained across from this specific Dominical letter.
Example: In the year 1606, the Epact is 21 original: "xxi." and the Dominical letter is A. If the Dominical letter A is taken from the old table, specifically the first one occurring below Epact 21, the following feasts will be found across from it: Septuagesima Sunday A pre-Lenten Sunday roughly 70 days before Easter on January 22; Ash Wednesday on February 8; Easter on March 26; Ascension of the Lord on May 4; Pentecost on May 14; and the Feast of Corpus Christi The Feast of the Body of Christ on May 25. There will be 28 Sundays between Pentecost and Advent that year, and Advent The season of preparation for Christmas will be celebrated on December 3. The same logic applies to other years. Likewise, in the year 1605, the Epact is 10 original: "x." and the Dominical letter is b, which is found in the table directly across from Epact 10. Therefore, the next letter b found further down must be taken. Across from that letter, you will find Septuagesima on February 6, Ash Wednesday on February 23, Easter on April 10, and so on.
It must be noted that in a common year, if the Dominical letter falls across from the Epact in the old table, we take the next instance of that letter below the Epact. Similarly, in a Leap Year Bissextilis: a year with 366 days, if either of the two current Dominical letters is found across from the Epact, the next two similar letters further down must be chosen to find the movable feasts.
The same movable feasts are found in the new Paschal table as follows: Look for the current Epact within the cell of the current Dominical letter. All movable feasts will be found directly in line with it. For example, in the year 1609, the cell for Dominical letter d is used. Across from Epact 24 original: "xxiv.", which runs that year, Septuagesima is held on February 15, Ash Wednesday on March 4, Easter on April 19, and so on.
Whether using the old or new Paschal table, all movable feasts in leap years must be found using the second Dominical letter. This is the letter that runs after the Feast of Saint Matthias the Apostle February 24. This prevents confusion about which of the two letters to use for a specific feast. However, one day must be added to the dates found for Septuagesima and Ash Wednesday if they fall in January or February. This is because the first Dominical letter runs before the day of Saint Matthias. After the Feast of Saint Matthias in February, although the second letter is in use, an intercalary day an extra day added to the calendar is added. Thus, February 24 is called the 25th, and the 25th is called the 26th. If Ash Wednesday falls in March, nothing needs to be added. In March, the second letter is active and the days of the month correspond to their proper numbers since the extra day was already added to February. Indeed, unless the second letter is used for searching, Septuagesima would not be found correctly in a leap year with Epact 24 or 25 and Dominical letters d and c. This
will become clear in the second and third examples for the years 4088 and 3784. For instance: in the leap year 2096, the Epact will be 5 original: "v." and the Dominical letters will be A and g. If the movable feasts are sought using the second letter, g, Septuagesima is found on February 11 and Ash Wednesday on February 28. If one day is added, Septuagesima falls on February 12, which is a Sunday, and Ash Wednesday falls on February 29, which is a Wednesday. Easter and the remaining feasts will fall on the days expressed in the table. Likewise, in the leap year 4088, the Epact will be 24 and the Dominical letters will be d and c. If the feasts are sought using the letter c, which is the second letter, Septuagesima is found on February 21. If one day is added, it falls on February 22, which is a Sunday. Ash Wednesday will fall on March 10; therefore, nothing is added. Again, in the leap year 3784, the Epact will be 25 and the Dominical letters will be d and c. Therefore, using the second letter c, Septuagesima will be found on February 21, which becomes the 22nd after adding one day. If the first letter d were used for either of these two years, the result would be incorrect. Below Epacts 24 and 25, the letter d indicates Septuagesima on February 15. This is false, because in that year the second letter c places Easter on April 25. Therefore, Septuagesima must be celebrated on February 22. This is clearly proven if one counts the Sundays backward from the date of Easter to Septuagesima.
Furthermore, in the first reformed old Paschal table, we have placed the Golden Numbers A nineteen-year cycle used to track the moon's phases before the Gregorian reform to the left of the Epacts. They are in the same order as they were before the correction of the Calendar. This was done so that anyone can find Easter and the other movable feasts for the period from the Council of Nicaea The church council in 325 AD that established the method for dating Easter until the year 1582. Movable feasts are extracted from these distributed Golden Numbers using the same method as the Epacts. For example, suppose one needs to find when these feasts were celebrated in the year 1450. In that year, the Golden Number was 7 and the Dominical letter was d. If Golden Number 7 is taken on the left side and the first letter d occurring below it is found, Septuagesima is found across from it on February 1, Ash Wednesday on February 18, and Easter on April 5.
Advent always begins on the Sunday closest to the Feast of Saint Andrew the Apostle November 30. This includes the period from November 27 to December 3. The current Dominical letter found in the Calendar between November 27 and December 3 indicates the Sunday of Advent. For example, if the Dominical letter is g, the first Sunday of Advent falls on December 2, because the letter g is at that position in the Calendar.
Finally, at the end of the Paschal tables, a temporary table of many years has been added. All movable feasts can be found across from these years. This table was extracted from the Paschal tables, from which infinite other years can be calculated.
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