Circumcision vs January 1

Circumcision and January 1 both are nouns.

Word	Noun	Adjective	Verb	Adverb
Circumcision	Yes	No	No	No
January 1	Yes	No	No	No

As nouns, Circumcision and January 1 are synonyms defined as:

Circumcision and January 1: (Roman Catholic Church and Anglican Church) feast day celebrating the circumcision of Jesus; celebrated on January 1st

Other synonyms of Circumcision include Feast of the Circumcision.

Circumcision (noun)	January 1 (noun)
(Roman Catholic Church and Anglican Church) feast day celebrating the circumcision of Jesus; celebrated on January 1st	the first day of the year
	(Roman Catholic Church) a holy day of obligation
	(Roman Catholic Church and Anglican Church) feast day celebrating the circumcision of Jesus; celebrated on January 1st