What is another word for day-and-night?
Pronunciation: [dˈe͡ɪandnˈa͡ɪt] (IPA) 
Day-and-night is an expression used to describe an activity or situation that goes on continuously, often without breaks or rest. There are several synonyms that can be used to convey this same meaning, such as non-stop, round-the-clock, 24/7, and eternal. These words are often used interchangeably in various contexts, such as in describing the operations of a hospital, factory, or customer service center that operates day-and-night to respond to clients' requests. Additionally, the phrase day-and-night can also express the notion of a stark contrast or difference, as in "the day-and-night difference between the two products." It denotes a sharp difference as if two things are completely opposite from each other.
