The Various Major Apostolic Feast Days In Christianity

Apostle / Disciple	Roman Catholic	Greek (Eastern) Orthodox	Coptic Orthodox	Armenian Apostolic	Syriac Orthodox	Georgian Orthodox	Other (Ethiopian, Assyrian, Maronite)	Notes (feast rank/notes)
Peter & Paul	June 29 (Solemnity of SS. Peter & Paul)	June 29 (New Calendar); July 12 (Old Calendar)	July 12 (Coptic Epip 5)	Dec 27 (Feast of SS. Peter & Paul)	June 29	June 29 (Julian: July 12 Gregorian)	Ethiopia: July 12 (Epip 5); Assyrian: June 29; Maronite: June 29	Joint major feast (martyrdom of both), ends Apostles’ Fast (Eastern)
James (son of Zebedee)	July 25 (Feast of St. James)	April 30 (Julian; May 13 Gregorian), June 30 (Synaxis)	April 25 (Coptic Parmouti 17)	(No separate feast)	(likely April 30 as Eastern)	April 30 (Julian; May 13 Gregorian)	Ethiopia: April 30; Assyrian: April 30; Maronite: July 25	July 25 (Western); April 30 (Orthodox); July 25 major feast (apostle; first martyr)
John (the Evangelist)	Dec 27 (Feast of St. John)	Sept 26; May 8 (Orthodox “Repose” and “Rod of Ephesus”)	Jan 12 (Coptic Toba 4)	(No fixed feast)	(No fixed feast)	Sept 26 (Julian: Oct 9 Gregorian)	Maronite: Dec 27; (Maronites also May 8, Sept 26)	Major feast (Nativity of John is June 24 – but John’s own feast is Dec 27 Western; Sept 26 Eastern)
Philip (Apostle)	May 3 (together with James the Less)	Nov 14; June 30 (Synaxis)	Nov 18 (Coptic Hathor 18)	Nov 17	(similar to Greek)	Nov 14 (Julian: Nov 27)	Ethiopia: Nov 18 (like Coptic); Assyrian: Nov 14; Maronite: May 3	Primary feast Nov 14 (Orthodox); Western celebrates May 3 (ancient joint feast)
Bartholomew (Apostle)	Aug 24 (Feast)	June 11 (with Barnabas)	Sept 11 (Coptic Tout 1)	Aug 24 (adopted Western date)	(not fixed)	June 11 (Julian: June 24)	Ethiopia: likely Aug 24; Assyrian: June 11; Maronite: Aug 24	Western: Aug 24 (major feast); Eastern: June 11 (with Barnabas)
Thomas (Apostle)	July 3	Oct 6 (primary); also June 20 (translation of relics) and Sunday after Pascha	(not individually listed)	(not separate)	July 3	Oct 6 (Julian: Oct 19)	Assyrian: Oct 6; Maronite: July 3	Western: July 3 (major); Orthodox: Oct 6 (major), and Sunday after Easter (“Thomas Sunday”)
Matthew (Apostle)	Sept 21	Nov 16	Oct 24 (Coptic Babah 14)	(Listed with Evangelists Oct 20)	(not fixed)	Nov 16 (Julian: Nov 29)	Assyrian: Nov 16; Maronite: Sept 21	Western: Sept 21 (major, Gospel writer); Eastern: Nov 16
Mark (Evangelist)	Apr 25 (Latin); (also Apr 25 Eastern)	Apr 25	(First Patriarch) Apr 25 (Coptic Baramouda 30)	(Evangelists Oct 20)	(no fixed)	Apr 25 (Julian: May 8)	Ethiopia: Apr 25; Assyrian: Apr 25; Maronite: Apr 25	Western/Orthodox: Apr 25 (joint evangelist feast); Coptic honors him Apr 25 (tradition)
James (son of Alphaeus)	May 3 (with Philip)	Oct 9	July 25 (Epip 18)	(none separate)	(likely Oct 9)	Oct 22 (Julian: Nov 4)	Maronite: May 3	Western: May 3 (with Philip); Orthodox: Oct 9
Thaddeus (Jude)	Oct 28 (with Simon)	June 19	(not separately)	(with Simon Oct 28)	(likely June 19)	June 19 (Julian: July 2)	Maronite: Oct 28	Western: Oct 28 (minor) – Feast of Sts. Simon & Jude; Orthodox: June 19 (with Bartholomew)
Simon (the Zealot)	Oct 28 (with Jude)	May 10	(not separate)	(with Jude Oct 28)	(likely May 10)	May 23 (Julian: June 5)	Maronite: Oct 28	Western: Oct 28 (minor; with Jude); Orthodox: May 10
Cleophas (Jude, Emmaus)	Sept 25	Sept 25 (Julian: Oct 8)	(not in major calendars)	(not separate)	(not separate)	Sept 25 (Julian: Oct 8)	Ethiopia: Sept 25	Feast of Cleophas on Sept 25 (Roman Martyrology) (minor commemoration)
Titus (companion of Paul)	Jan 26 (with Timothy)	Aug 25; Jan 4	(no fixed)	(no separate)	(not fixed)	Aug 25 (Julian: Sept 7)	Assyrian: Aug 25	Orthodox: Aug 25, Jan 4; Western: Jan 26 (memorial with Timothy)
Crescens (comp. of Paul)	(no observance)	(no fixed)	–	–	–	–	–	Not commemorated liturgically in major calendars.
Eunuch of Candace	–	Aug 27 (baptism)	–	–	–	Aug 27 (Julian: Sept 9)	Aug 27 (Ethiopian)	Commemorated for baptism by St. Philip; Ethiopian Church commemorates Aug 27 (also Jan 4 in some sources).