Examples:

• Instead, people keep talking here as if 'zero hour' were just beginning.
• This is zero hour for me.
• Nicaragua is once again reaching zero hour.
• At a minute past zero hour the country's entire railway system was paralyzed.
• We'd like you to join our program, Become part of zero hour.
• An hour till zero hour.
• For Baumeister - as for many artists - the zero hour of was a longed-for new beginning.
• If it comes down to zero hour, and he still hasn't given us electricity, We'II do the deed.
• The subsequent test engines will not be subjected to the running-in procedure, but their zero hour emissions will be modified by the evolution coefficient.
• I come home to find a man in the same boat with me... and my wife says, "What does it matter?" But Mr. Tura, this is zero hour.