昼

daytime

one of the characters used to represent a musical note in gongche notation, 工尺譜|工尺谱[gong1 che3 pu3]

a Chinese foot / one-third of a meter / a ruler / a tape-measure / one of the three acupoints for measuring pulse in Chinese medicine / CL:支[zhi1],把[ba3]

dawn / morning / daybreak / day / dan, female roles in Chinese opera (traditionally played by specialized male actors)

day and night / period of 24 hours / continuously, without stop

daytime

to make day as night (idiom, from Book of Songs); fig. to prolong one's pleasure regardless of the hour

as bright as daylight (idiom)

day and night (to toil, to abandon oneself to pleasure etc)

to travel at night and lie low by day (idiom)

Zai Yu sleeps by day (idiom); refers to story in Analects of Confucius remonstrating bitterly with his student for sleeping during lectures

day and night / round-the-clock

nocturnal / to hide by day and come out at night

the equinox

circadian rhythm

the winter days are short and the nights long (idiom)

lit. to make night as day (idiom); fig. to burn the midnight oil / work especially hard