Annualy the fourth Sunday of May being the Sunday near the 28th of May, the date of unification of the United Roman-Ruthenian Church. This feast was established in honour of the four patronal saints of the Holy Apostolic See of Saints Peter, Andrew, Stephen, and Mark of Rome-Ruthenia, the principle See of the United Roman-Ruthenian Church. The Holy Apostolic See consists of the jurisdictions of the Diocese of Rome-Ruthenia, the Metropolitan See of Aquileia, and the Catholicate of Rome-Ruthenia. These are the episcopal, metropolitan, and patriarchal jurisdictions of the Supreme Pontiff of the United Roman-Ruthenian Church as Prince-Bishop, Metropolitan, and Pope-Catholicos respectively. Other Key Feasts throughout the Year: United Roman-Ruthenian Church and Catholicate of Rome-Ruthenia Sts. Peter and Andrew, Apostles - 29 June and 30 November Pontifical Imperial State Sts. Peter and Paul, Apostles - 29 June Diocese of Rome-Ruthenia St. Stephen the Deacon and Protomartyr - 3 August and 26 December Metropolitan See of Aquileia St. Mark the Apostle - 25 April Pontifical Kingdom of Ruthenia St. George, Martyr and St. Vladimir of Kiev - 23 April and 15 July Apostolic Founder St. Edwin Caudill - 25 October Holy Fathers Pope St. Leo X and St. Archbishop Aftimios - 1 December and 24 July Founding of Rome 21 April Founding of Ruthenia and the Old Russian State Feast St. Vladimir of Kiev - 15 July Date of the Principle Patronal Feast from 2025 - 2124 Note: When the feast coincides with a feast of greater rank, being Pentecost or Trinity Sunday, then it is moved to the Sunday within the Octave of Corpus Christi. 2025: May 25 2026: May 24 (Pentecost Sunday) 2027: May 23 (Trinity Sunday) 2028: May 28 2029: May 27 (Trinity Sunday) 2030: May 26 2031: May 25 2032: May 23 (Trinity Sunday) 2033: May 22 2034: May 28 (Pentecost Sunday) 2035: May 27 2036: May 25 2037: May 24 (Pentecost Sunday) 2038: May 23 2039: May 22 2040: May 27 (Trinity Sunday) 2041: May 26 2042: May 25 (Pentecost Sunday) 2043: May 24 (Trinity Sunday) 2044: May 22 2045: May 28 (Pentecost Sunday) 2046: May 27 2047: May 26 2048: May 24 (Pentecost Sunday) 2049: May 23 2050: May 22 2051: May 28 (Trinity Sunday) 2052: May 26 2053: May 25 (Pentecost Sunday) 2054: May 24 (Trinity Sunday) 2055: May 23 2056: May 28 (Trinity Sunday) 2057: May 27 2058: May 26 2059: May 25 (Trinity Sunday) 2060: May 23 2061: May 22 2062: May 28 2063: May 27 2064: May 25 (Pentecost Sunday) 2065: May 24 (Trinity Sunday) 2066: May 23 2067: May 22 (Pentecost Sunday) 2068: May 27 2069: May 26 2070: May 25 (Trinity Sunday) 2071: May 24 2072: May 22 2073: May 28 2074: May 27 2075: May 26 (Pentecost Sunday) 2076: May 24 2077: May 23 2078: May 22 (Pentecost Sunday) 2079: May 28 2080: May 26 (Pentecost Sunday) 2081: May 25 (Trinity Sunday) 2082: May 24 2083: May 23 (Pentecost Sunday) 2084: May 28 2085: May 27 2086: May 26 (Trinity Sunday) 2087: May 25 2088: May 23 2089: May 22 (Pentecost Sunday) 2090: May 28 2091: May 27 (Pentecost Sunday) 2092: May 25 (Trinity Sunday) 2093: May 24 2094: May 23 (Pentecost Sunday) 2095: May 22 2096: May 27 2097: May 26 (Trinity Sunday) 2098: May 25 2099: May 24 2100: May 23 (Trinity Sunday) 2101: May 22 2102: May 28 (Pentecost Sunday) 2103: May 27 2104: May 25 2105: May 24 (Pentecost Sunday) 2106: May 23 2107: May 22 2108: May 27 (Trinity Sunday) 2109: May 26 2110: May 25 (Pentecost Sunday) 2111: May 24 (Trinity Sunday) 2112: May 22 2113: May 28 (Trinity Sunday) 2114: May 27 2115: May 26 2116: May 24 (Trinity Sunday) 2117: May 23 2118: May 22 2119: May 28 2120: May 26 2121: May 25 (Pentecost Sunday) 2122: May 24 (Trinity Sunday) 2123: May 23 2124: May 28 (Trinity Sunday)

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