round-the-clock

(not comparable)Continuous; incessant; without interruption; all day long, 24 hours per day; nonstop: from the concept that it happens while the hands of the clock go all the way around.

They are protected by round-the-clock guards.

vierundzwanzigstündig

круглосу́точныйkruglosútočnyj

цілодобови́йcilodobovýj