Simon Bar-Jona who Jesus re-named 
Peter 
was initially credited with writing the letters 
1 Peter & 
2 Peter 
and also has been acclaimed as the initial 
Vicar of Christ (Pope)
Peter's brother 
Andrew
James son of Zebedee, AKA the Greater, was initially credited with writing the 
letter of James, 
James' brother 
John was initially credited with writing both the 
Gospel of John and the 
Apocalypse (Revelation) he was also 
entrusted with the care of Jesus' mother Mary
Philip
Bartholomew AKA Nathanael
Thomas
Matthew AKA the tax collector, was initially credited with writing the 
Gospel of Matthew
James son of Alphaeus, AKA the Lesser
Thaddaeus (AKA Jude/Judas, brother of James) The 
letter of Jude was originally attributed to Jude Thaddaeus 
Simon AKA the Cananean (the Zealot)
Matthias 
who was chosen to replace the traitor 
Judas Iscariot
Holy Days of Obligation for the Catholic Church 
	Holy 
Mary Mother of God, January 1 
	(
Theotokos - God Bearer)
	
	
Epiphany (U.S.: Sunday after January 1)
	
	
Easter Sunday (as are all Sundays)
	
	
Ascension, Thursday 40 days after Easter (that Sunday in some dioceses)
	
	
Corpus Christi, Thursday after Trinity Sunday (Sunday after Trinity in some dioceses)
	
	
Assumption, August 15
	
	
St. Joseph, March 19
	
	Apostles Saints. Peter and Paul (not normally observed)
	
	
All Saints, November 1
	
	
Immaculate Conception, December 8
	
	
The Nativity of Our Lord Jesus Christ (Christmas), December 25