The phrase "impossible deadline" is grammatically correct and can be used in written English.
It is typically used to describe a task or project that cannot be completed within the given time frame. Example: The boss gave us an impossible deadline to finish the project by tomorrow.
Especially with a nearly impossible deadline.
But with Mr Blanco they set an impossible deadline of 48 hours.
"A lot of composers with a formal music education background have never really been exposed to the impossible deadline.
There, they toiled seven days a week to make a seemingly impossible deadline: a ribbon-cutting by Sept. 11, 2002.
And it left the city's Department of Parks and Recreation with a seemingly impossible deadline: preparing the beach to open by Memorial Day weekend.
"Tell them you need advice on how to deal with a difficult colleague, or on how to meet an impossible deadline,'' she said.
We were printing local election leaflets, a lot of it very agitprop in nature and, as always, chasing impossible deadlines.
But this hectic, collaborative life is nothing like the novelist's, especially when it comes to the nerve-jangling pressure to meet impossible deadlines.
There are impossible deadlines, hours of waiting around for tardy chefs and off-the-map assignments, like the two days I spent under armed guard in a walled compound in Bogotá, while the chef I was working with disappeared into the Colombian countryside.
A one-woman production line copying from Britten's hurriedly transcribed manuscripts, she was instrumental in Britten's ability to complete major works - including Gloriana, The Turn of the Screw and the War Requiem - year after year, to almost impossible deadlines.
In reality, student life can give your confidence a kicking – whether you're up against seemingly impossible deadlines, stressing about how you'll pay your rent or paralysed by existential angst about what you're going to do with your life.
