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

one day

(rare) the first day of the month

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

(idiomatic, Buddhism) things that do not exist; rabbit horns

being apt to; being prone to; tending to / (in the form of とかくの (tokaku no)) all sorts of (negative things); various / this and that / anyway, anyhow

一日, 1日: one day

one person

all day

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