"day of trouble" is correct and usable in written English.
You might use it to describe an especially difficult day, for example: Today has been a day of trouble for my family.
On Facebook he invoked the book of Psalms, along with a desperate plea for peace: "In the day of my trouble I call upon you, for you answer me".
"They weren't even outside on the day of the troubles," he said, holding up photos of his sons.
Maple's cloak is on view in a 15-day series of "trouble-making" workshops, events and gatherings, dubbed "Art of Nuisance".
On Wednesday, I arrived at three o'clock, and instantly heard incessant chatter about what had happened the previous day: about six hours of trouble involving between 50 and 100 young people, who smashed windows with bricks, and tried to barricade High Street using a van and a Range Rover, which were set on fire.
Of course we are witnesses every day of the same troubles in other parts of the world.
Mr. Romney, who sought and was given control of the accident investigation Thursday night by the legislature, said 120 more potential flaws like loose nuts and bolts had been found Friday, bringing the number of trouble spots to more than 360.
The Moe Greene scenes were planned as a three-day shoot, but because of trouble between Coppola and the producers and Brando's difficult temperament, it was delayed six months, with Rocco being paid all the time.
But they raided three Renault offices Thursday, and the whiff of trouble had stockholders burning rubber.
