up to now vs to date

up to now and to date both are adverbs.

Word	Noun	Adjective	Verb	Adverb
up to now	No	No	No	Yes
to date	No	No	No	Yes

As adverbs, up to now and to date are synonyms defined as:

up to now (adverb)	to date (adverb)
used in negative statement to describe a situation that has existed up to this point or up to the present time	prior to the present time
prior to the present time