Tonight, i.e., the coming nighttime, nahdom, period immediately following the present daytime, nawā'ah, period.
Awni ta +ūgab ya un'a umāli ta mun'ul'ulgudta.
Wait until tonight and then come and let's tell stories.
As part of a sentence introducer, ūgab is preceded either by hi or awni ta:
Hi +ūgab ya tumū'al ami.
Tonight we will stay up all night.
As sentence comment, or time margin following a sentence, ūgab is preceded by hi:
Hi +ūgab di a'amūngan tu'u hi dolan Bumallātung an munhahāpit.
The time for us to gather at Bumallātung's house to talk together will be tonight.
A specific time within the general nighttime designation may be specified by hi or hinan followed by either a time verb or temporal verb phrase inflected for non-past tense, or by a time noun.
Hi +ūgab hi umāpeh.
Tonight, very early in the morning.