俾夜作昼

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

to burn the midnight oil (idiom); to work continuously night and day

to rise early and sleep late (idiom); to work hard; to study diligently

to raise a lantern and fight at night (idiom); fig. to work into the night; to burn the midnight oil

to burn the midnight oil; to work late into the night

night and day (idiom); continuous strenuous effort