Judaism vs Jewish calendar

Judaism and Jewish calendar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Judaism	Yes	No	No	No
Jewish calendar	Yes	No	No	No

Judaism (noun)	Jewish calendar (noun)
the monotheistic religion of the Jews having its spiritual and ethical principles embodied chiefly in the Torah and in the Talmud	(Judaism) the calendar used by the Jews; dates from 3761 BC (the assumed date of the Creation of the world); a lunar year of 354 days is adjusted to the solar year by periodic leap years
Jews collectively who practice a religion based on the Torah and the Talmud