mundane vs everyday

mundane and everyday both are adjectives.

Word	Noun	Adjective	Verb	Adverb
mundane	No	Yes	No	No
everyday	No	Yes	No	No

As adjectives, mundane and everyday are synonyms defined as:

Other synonyms of mundane include quotidian, routine, unremarkable, workaday.

mundane (adjective)	everyday (adjective)
belonging to this earth or world; not ideal or heavenly	commonplace and ordinary
found in the ordinary course of events	appropriate for ordinary or routine occasions
concerned with the world or worldly matters	found in the ordinary course of events