Day-and-night and In order

Day-and-night adjective - At all times.

In order and day-and-night are semantically related. In some cases you can use "In order" instead an adjective phrase "Day-and-night".

In order adjective - In a state of proper readiness or preparation or arrangement.

Day-and-night and in order are semantically related. Sometimes you can use "Day-and-night" instead an adjective phrase "In order".