| 昼 | [ zhoù ] daytime |
| 昼伏夜出 | [ zhoù fú yè chū ] nocturnal, to hide by day and come out at night |
| 昼夜 | [ zhoù yè ] day and night, period of 24 hours, continuously, without stop |
| 昼夜平分点 | [ zhoù yè píng fēn diǎn ] the equinox |
| 昼夜节律 | [ zhoù yè jié lǜ ] circadian rhythm |
| 昼短夜长 | [ zhoù duǎn yè cháng ] the winter days are short and the nights long (idiom) |
| ⇒ 不分昼夜 | [ bù fēn zhoù yè ] day and night, round-the-clock |
| ⇒ 俾夜作昼 | [ bǐ yè zuò zhoù ] lit. to make night as day (idiom); fig. to burn the midnight oil, work especially hard |
| ⇒ 俾昼作夜 | [ bǐ zhoù zuò yè ] to make day as night (idiom, from Book of Songs); fig. to prolong one's pleasure regardless of the hour |
| ⇒ 俨如白昼 | [ yǎn rú baí zhoù ] as bright as daylight (idiom) |
| ⇒ 卜昼卜夜 | [ bǔ zhoù bǔ yè ] day and night (to toil, to abandon oneself to pleasure etc) |
| ⇒ 夜行昼伏 | [ yè xíng zhoù fú ] to travel at night and lie low by day (idiom) |
| ⇒ 宰予昼寝 | [ zaǐ yǔ zhoù qǐn ] Zai Yu sleeps by day (idiom); refers to story in Analects of Confucius remonstrating bitterly with his student for sleeping during lectures |
| ⇒ 白昼 | [ baí zhoù ] daytime |