1 variant: 夜 yè

1 midnight

2 in the middle of the night

1 nightclub

1 nighttime

2 evening or night (e.g. classes)

1 New Year's Eve family dinner

1 lit. to make night as day (idiom); fig. to burn the midnight oil

2 work especially hard

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

1 lit. use others' strengths to make up for one's weak points (idiom from Mencius)

2 to use this in place of that

3 what you lose on the swings, you win on the roundabouts

1 lit. the mouth that has been fed by others is soft, the hand that has received doesn't reach (idiom)

2 fig. one is partial to those from whom presents have been accepted

1 to work from morning to night (idiom)