one day

(rare) the first day of the month

all day

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

sun / daytime, daylight / day

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

the eighth day of the month / eight days

the ninth day of the month / nine days

the seventh day of the month / seven days

the first day of the month (solar or lunar calendar)