いつか5th day of the month; five days
Noun
いつかsometime; someday; one day; some time or other; the other day; in due course; in time
Adverb
何時からsince when; from when; how long
Expression
何時かはsooner or later; in due time; in due course
Adverb
何時からかsince some time or another; since who-knows-when
Expression
何時かしらbefore one knows; before one becomes aware of; unnoticed; unawares
Adverb
いつかそのうちone of these days; before very long; in the near future
Expression