Synonyms of night and day in English:

night and day

See US English definition of night and day

See UK English definition of night and day



all the time, the entire time, around the clock, day and night, morning, noon, and night, day in, day out, without a break, ceaselessly, endlessly, incessantly, interminably, constantly, unceasingly, perpetually, permanently, continuously, continually, eternally, unremittingly, remorselessly, relentlessly
informal 24, 7
archaic without surcease