The phrase "a time when leaders" is correct and usable in written English.
It can be used to refer to a specific period or moment in history or a situation where leadership is a focal point.
Example: "There was a time when leaders had to make difficult decisions that shaped the future of their nations."
Alternatives: "an era in which leaders" or "a period when leaders".
But the Republican added, "There is a time when leaders have to make the hard decisions".
The political uncertainty puts new strains on the euro at a time when leaders had hoped the worst of the crisis in the currency zone was over.
The North Koreans have also gained a stronger negotiating hand, in part because they acted at a time when leaders in Washington wanted to concentrate on Iraq.
This must be a time when leaders in both parties put the urgent needs of our nation above our own narrow interests.
But at a time when leaders of both parties are clashing over a stubbornly high unemployment inching toward 10 percent, it was Mr. Bloomberg's harsh assessment of Washington politics and his call for centrist problem-solving that was most striking.
Any inquiry will doubtless cast blame widely and could cause tensions between the two parties and between rival intelligence bureaucracies at a time when leaders are trying to rally and unite the nation.
They sang raunchy encomiums like "Slum Goddess" and set Blake and Swinburne to a groovy beat at a time when "Leader of the Pack" and "I Want to Hold Your Hand" were the cutting edge of pop.
Others have a designated annual time when leaders (i.e., co-chairs, president, etc).
This is a critically important time, when leaders of faith need to address issues of race more thoughtfully, prayerfully, and courageously.
A final segment features a set of quotations in which American political leaders pay tribute to the timeless importance of the Greeks (reminding us of a time when such leaders knew that the Greeks existed).
And at a time when party leaders in Washington have launched an extensive campaign to vilify top Republican donors, particularly Senate Majority Leader Harry Reid's (D-Nev).
