zero hour
US /ˈzɪroʊ ˈaʊər/
UK /ˈzɪroʊ ˈaʊər/
1.
hora cero, momento crucial
the time at which a planned operation or event is scheduled to begin
:
•
The troops were ready for zero hour, awaiting the command to advance.
Las tropas estaban listas para la hora cero, esperando la orden de avanzar.
•
The launch countdown began, signaling that zero hour was approaching.
La cuenta regresiva del lanzamiento comenzó, señalando que la hora cero se acercaba.