天有不测风云，人有旦夕祸福

天有不測風雲，人有旦夕禍福
tiānyǒubùcèfēngyún,rényǒudànxīhuòfú
fortune as unpredictable as the weather, every day may bring fortune or calamity (idiom); sth unexpected may happen at any moment

CEDICT

Entry Composition

1 天有不测风云 tiānyǒubùcèfēngyún short for 天有不測風雲，人有旦夕禍福／天有不测风云，人有旦夕祸福 (tiān yǒu bùcè fēngyún, rén yǒu dànxī huòfú, “Disasters and misfortunes are unpredictable”)
2 人 rén person; people

classifiers: 個, 位
3 有 yǒu
  1. to have; there is
  2. (bound form) having; with; -ful; -ed; -al (as in 有意 yǒuyì intentional)
4 旦夕 dànxī
  1. (formal) morning and evening
  2. (formal) short time; sooner or later; imminent; on the horizon
  3. morning and evening
  4. short time; sooner or later; imminent; on the horizon
5 祸福 huòfú disaster and happiness