one day

the daytime, during the day / a half day, half of a day

before the day is done

general cleaning (especially one at the end of the year)

clean generally, houseclean

(rare) the first day of the month

all day, throughout the day, sunrise to sunset, all around the clock

one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

(collective, chiefly attributive) Japan and China

the daytime, during the day / noon, midday