Antonyms of adj day-and-night

1 sense of day-and-night

Sense 1
around-the-clock, day-and-night, nonstop, round-the-clock -- (at all times; "around-the-clock nursing care")

INDIRECT (VIA continuous) -> discontinuous, noncontinuous -- (not continuing without interruption in time or space; "discontinuous applause"; "the landscape was a discontinuous mosaic of fields and forest areas"; "he received a somewhat haphazard and discontinuous schooling")

Similarity of adj day-and-night

1 sense of day-and-night

Sense 1
around-the-clock, day-and-night, nonstop, round-the-clock -- (at all times; "around-the-clock nursing care")
       => continuous (vs. discontinuous), uninterrupted -- (continuing in time or space without interruption; "a continuous rearrangement of electrons in the solar atoms results in the emission of light"- James Jeans; "a continuous bout of illness lasting six months"; "lived in continuous fear"; "a continuous row of warehouses"; "a continuous line has no gaps or breaks in it"; "moving midweek holidays to the nearest Monday or Friday allows uninterrupted work weeks")