one day

(rare) the first day of the month

coffee break

afternoon, PM

highlight (strongly illuminated area in a drawing, painting, or photograph) / highlight (especially significant or interesting detail or event) / highlight (of hair)

to highlight (mark with a fluorescent marker)

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

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