all day

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

(literary) one day, 24 hours / (literary) the daytime, the period from dawn until dusk / (literary) (figuratively) a short period of time

(obsolete) one day, 24 hours / (obsolete) the daytime, the period from dawn until dusk

(rare, obsolete) (all senses appear to be identical as for hitohi above)

use one thing for many purposes / work someone hard

to use one's head

waiting impatiently / time dragging on

A Japanese surname.

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