- 危在旦夕 wēizàidànxī in imminent peril(idiom) in deadly peril; on the brink of crisis; describes a situation where danger is expected to strike at any moment
- 命在旦夕 mìngzàidànxī to be at death's doorTo be on one's deathbed or very close to death; also used to describe a situation that is extremely critical or in imminent danger
- 人有旦夕祸福 rényǒudànxīhuòfú man's fate is uncertainHuman life is full of unpredictable turns; man's fate is as changeable as the weather. Often used alongside [[天有不测风云|天有不測風雲|tian1 you3 bu4 ce4 feng1 yun2]] to emphasize that misfortune can strike at any moment.
- 旦夕祸福 dànxīhuòfú sudden changes of fortuneUnexpected misfortune or changes in luck that can happen at any moment; often used in the context of warning that disaster may strike suddenly.
- 只争旦夕 zhǐzhēngdànxī to seize the moment(idiom) to seize every minute; to make the best use of every moment
- 天有不测风云，人有旦夕祸福 tiānyǒubùcèfēngyúnrényǒudànxīhuòfú anything can happenFortune is as unpredictable as the weather, and every day may bring luck or disaster; used to express that something unexpected may happen at any moment.
- 旦夕之危 dànxīzhīwēi imminent dangerThe danger of death or destruction at any moment; an extremely urgent and hazardous situation.