from day to day (в некоторых контекстах); any day (now); any day now (lexicographer); any day soon (4uzhoj); day in day out; from one day to the next; any time now (goldy10)

before long (She will come here before long.); from one day to another

erelong (VLZ_58)

day-to-day (Trotz said defenseman Brooks Orpik, who missed the game with a lower-body injury, is day-to-day and could play Friday. VLZ_58)

ждать, ожидать со дня на день

со дня на день