The phrase "an ambitious deadline" is correct and usable in written English.
It can be used when referring to a deadline that is challenging or difficult to meet, often implying a high level of effort or commitment is required.
Example: "The project manager set an ambitious deadline for the completion of the new software, pushing the team to work overtime."
Alternatives: "a challenging deadline" or "a tight deadline."
"We set an ambitious deadline four years ago," he said.
The European negotiators expect the deal to be done in two years, an ambitious deadline.
Peace negotiations have progressed at a snail's pace despite an ambitious deadline of Sept. 13, by which the entire Israeli-Palestinian conflict is supposed to be resolved.
Mr. Reid assured everyone that the Senate would pass a stimulus bill no later than Feb. 15, an ambitious deadline that he personally imposed and, ultimately, met by more than a week.
"Beyond the Hills" was filmed on location last winter, with Mr. Mungiu pushing his cast and himself to meet an ambitious deadline that would allow him to edit the film to two and a half hours to have it ready for showing at Cannes.
I love an ambitious deadline as much as the next guy, but unless the company has made a huge amount of progress since the Indiegogo campaign was put together, the odds of meeting that production schedule seem slim.
He has set ambitious deadlines for Tesla many times, only to see timetables slip.
Since then the OPCW has scrambled to meet ambitious deadlines for disarming and destroying Syria's estimated 1,300-ton 1,300-tonwhich includes mustarsenal.
Some Israeli commentators wondered whether Mr. Barak's ambitious deadlines for progress in peace talks would prove nothing more than hollow boasts.
The new Transportation Security Administration has given critics reason to question its ability to meet the ambitious deadlines set by Congress for installing new passenger screeners and bomb-detecting machines at airports.
The resolution, adopted unanimously, gives extra teeth to the solo promises of a withdrawal made in the last eight months by Prime Minister Ehud Barak, who set ambitious deadlines when he took office for securing regional peace on the Lebanese, Syrian and Palestinian fronts.
