legal holiday vs national holiday

legal holiday and national holiday both are nouns.

Word	Noun	Adjective	Verb	Adverb
legal holiday	Yes	No	No	No
national holiday	Yes	No	No	No

As nouns, legal holiday and national holiday are synonyms defined as:

legal holiday and national holiday: authorized by law and limiting work or official business

Other synonyms of legal holiday include public holiday.

legal holiday (noun)	national holiday (noun)
authorized by law and limiting work or official business	authorized by law and limiting work or official business